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Debromoaplysiatoxin

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697:(PKC) is likely to be responsible for the antiproliferative and tumor-promoting activities of aplysiatoxin-related compounds. Tumor promoters like PDBu and ATX bound potently to the C1 domains of both conventional and novel PKCs, while antiproliferative compounds such as aplog-1 and bryo-1 exhibited some selectivity for novel PKCs other than PKCε, that is, PKCδ, PKCη, and PKCθ. The affinity of DAT for the PKC C1 domains is quite similar to that of aplysiatoxin. The introduction of a methylgroup group into position 4 could enhance the affinity for conventional PKCs rather than for novel PKCs, and the introduction of a methyl group into position 10 would enhance the affinity for both conventional and novel PKCs. Activation of 225: 723:
moiety of aplog-1 would enhance antiproliferative activities but not tumor-promoting activity. The antiproliferative activities of the analogs to not simply depend on molecular hydrophobicity, and the local hydrophobicity around position 10 plays an important role in enhancing antiproliferative activities. Because the analogues possess the skeleton of tumor-promoting aplysiatoxin and debromoaplysiatoxin, the adverse effects would be most likely tumor promotion.
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groups at position 6 are indispensable to these activities, but that the hydroxyl group at position 18 is not necessary. Of note, the more hydrophobic 12,12-dimethyl-aplog-1 did not show any tumor-promoting activity in vitro or in vivo. These results suggest that hydrophobicity around the spiroketal
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In the aplysiatoxin class, debromoaplysiatoxin, aplysiatoxin, and 19-bromoaplysiatoxin have been found to be tumor promoters in mouse skin. Also rat tracheal cells in culture are sensitive indicators for the presence of the polyacetates, aplysiatoxin and debromoaplysiatoxin. It causes increase in
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Aplog-1, a simple and less hydrophobic analog of aplysiatoxin, is a PKC ligand with little tumor-promoting activity that showed growth-inhibitory activities against several cancer cell lines. Multiple derivatives were evaluated for their antiproliferative activity against several human cancer cell
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The first reported case of seaweed dermatitis was from 1958 in Hawaii on Oahu island. About 125 people who had been swimming in the sea get suffered from symptoms like itching, burning, blisters, rash and desquamation. The causative substance of this seaweed dermatitis was not known till 1968 when
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The response of animals to debromoaplysiatoxin is variable. For example, the response of mice with P-388 lymphocytic leukemia to injections of debromoaplysiatoxin. The result was that the mice had good antileukemia response after treatment with debromoaplysiatoxin. The disadvantage was that these
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and was found to cause dermatitis. It has been found to be active at concentrations of 0.005 nmol per ear. The compound was first isolated from the digestive tract of the sea hare Stylocheilus longicauda. Accidental skin contact with sea hare toxin extract led to skin irritations. This phenolic
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In rabbits and hairless mice topical application of debromoaplysiatoxin produced severe cutaneous inflammatory reactions. DAT produces dermatitis on the murine ear at a very low dose. This inflammation response and the mechanism of tumor promotion is likely to be mediated through activation of
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Because of the sterically complex and particular molecular structure, debromoaplysiatoxin is an attractive target for total synthesis. This compound combines spiro acetal, hemiacetal and diolide functionalities, which result in peculiar biological activities. To this date, only Yoshita Kishi's
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Debromoaplysiatoxin has two effects on cell-growth: it has a tumor-promoting-activity as well as an anti-proliferation activity. Therefore, this compound is of interest for study: by finding which groups cause the tumor-promoting activity, and removing them, the new compound will only have an
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colony formation and is in agreement with a proliferative activation ('triggering') of the basal cell population from the normally quiescent Go state found in intact tracheal epithelium. The results also suggest that the polyacetates are good candidates for tumor promoters in vivo.
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growing on the dorsa of manatees would cause 24 h per day exposure to the toxin. It may be hypothesized that the continual presence of these toxin-producing cyanobacteria on the skin of these clinically ill animals may be contributing to their dermatologic disease. (5)
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InChI=1S/C32H48O10/c1-18(11-12-24(38-7)22-9-8-10-23(34)13-22)29-20(3)26-16-32(41-29)30(5,6)15-19(2)31(37,42-32)17-28(36)39-25(21(4)33)14-27(35)40-26/h8-10,13,18-21,24-26,29,33-34,37H,11-12,14-17H2,1-7H3/t18-,19+,20-,21+,24-,25+,26?,29+,31-,32-/m0/s1
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is found to be a cause for the tumor-promoting activity, and removal of the methoxy-group causes the antiproliferation activity to increase, without changing the tumor-promoting activity. Studies with analogs of debromoaplysiatoxin show that the
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Kikumori, M.; Yanagita, R.C.; Tokuda, H.; Suzuki, N.; Nagai, H.; Suenaga, K.; Irie, K. (June 2012). "Structure–Activity Studies on the Spiroketal Moiety of a Simplified Analogue of Debromoaplysiatoxin with Antiproliferative Activity".
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against mice is also shown in Table 1. Aplysiatoxin was twice as toxic to mice as debromoaplysiatoxin. The characteristic symptom of these toxins in mice was diarrhea, which usually occurred 30 minutes after injection of toxins.
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Horowitz, A.D.; Fujiki, H.; Weinstein, I.B.; Jeffrey, A.; Okin, E.; Moore, R.E.; Sugimara, T. (1983). "Comparative Effects of Aplysiatoxin, Debromoaplysiatoxin, and Teleocidin on Receptor Binding and Phospholipid Metabolism".
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Mass, M.J.; Lasley, J.A.; Marr, C.M.; Arnold, J.T.; Steele, V.E. (January 1987). "Colony formation enhancement of rat tracheal and nasal epithelial cells by polyacetate, indole alkaloid, and phorbol ester tumor promoters".
804:-dominated mats were also collected from the walls of manatee holding tanks. Manatee feces was sampled from the anal opening and debromoaplysiatoxin was identified in multiple samples, proving the exposure of manatees to 922:
Okamura, H.; Kuroda, S.; Ikegami, S.; Tomita, K.; Sugimoto, Y.; Sakaguchi, S.; Ito, Y.; Katsuki, T.; Yamaguchi, M. (November 1993). "A Formal Synthesis of Aplysiatoxin - Enantioselective Synthesis of Kishi Aldehyde".
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Fujiki, H.; Ikegami, K.; Hakii, H.; Suganuma, M.; Yamaizumi, Z.; Yamazato, K.; Moore, R.E.; Sugimara, T. (1985). "A blue-green alga from Okinawa contains aplysiatoxins, the third class of tumor promoters".
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of debromoaplysiatoxin are relatively nontoxic. Examination of the structure–activity relationship (SAR) of this hydrophobic region showed that the absence of the brominated molecule in moieties of
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Harr, K.E.; Szabo, N.J.; Cichra, M.; Phlips, E.J. (August 2008). "Debromoaplysiatoxin in Lyngbya-dominated mats on manatees (Trichechus manatus latirostris) in the Florida King's Bay ecosystem".
789:(a sea slug) has been established. This indicates that the compound isn't excreted by the animals causing a higher risk of death related to the amount of food consumed by the animal and its age. 517:
Years later, in 1994, local people of Hawaii, Maui and Oahu island in Hawaii were poisoned by food. The local residents of these islands often eat various types of algae including the red alga
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toxins. It is highly plausible that dermal disease in the manatee population is linked with exposure to Lyngbyatoxins. In contrast to humans who would likely have periodic exposure to
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Furthermore, scientists speculate that debromoaplysiatoxin is accumulated in marine organisms by trophic transfer. In particular, trophic transfer of debromoaplysiatoxin from
523:. After taking samples of this red alga it turned out that they contained two toxins which were identical with aplysiatoxin and debromoaplysiatoxin. Moreover, they observed 895:
Nagai, H.; Yasumoto, T.; Hokama, Y. (July 1996). "Aplysiatoxin and debromoaplysiatoxin as the causative agents of a red alga Gracilaria coronopifolia poisoning in Hawaii".
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formation must be achieved between the C.7 ketone and the C.11 hydroxygroup, after which lactone formation can seal the deal. This can be achieved by a method called
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Mynderse, J.S.; Moore, R.E.; Kashiwagi, M.; Norton, T.R. (1977). "Antileukemia Activity in the Oscillatoriaceae: Isolation of Debromoaplysiatoxin from Lyngbya".
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side group can be achieved. This intermediate can be converted into a terminal epoxide by usage of classical synthetical operations, such as introducing
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that originates from optically active starting materials. This coupling reaction is most efficient when the sulfone is transformed into a dianion with
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Capper, A.; Tibbetts, I.R.; O'Neil, J.M.; Shaw, G.R. (July 2005). "The fate of Lyngbya majuscula toxins in three potential consumers".
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Hashimoto, Y.; Kamiya, H.; Yamazato, K.; Nozawa (1975). "Occurrence of a toxic blue-green alga inducing skin dermatitis in okinawa".
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The following step involves introducing an acidic sidechain on the C.9 hydroxyl group. This carboxylic, acidic side group is made of
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bislactones has been shown to have potent tumor promoting activities. Debromoaplysiatoxin produces erythema, blisters and necrosis.
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at position 3 and/or the methoxy group at position 15 in debromoaplysiatoxin would be responsible for the tumor-promoting activity.
239: 658:(DDQ) treatment, this β-keto thioester can be converted into an unstable diol, which is the acyclic precursor of the end product. 626: 614:. In order to produce the primary alcohol, it is necessary to adjust the protecting group of the C.30 once again, back to BOM. 495:
people in Okinawa, Japan, suffered from the same symptoms as the people in Hawaii. After researchers took samples in 1973 from
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produce aplysiatoxin and debromoaplysiatoxin, it's probable that they are the true origin of this food poisoning case.
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Solomon, A.E.; Stoughton, R.B. (1978). "Dermatitis from purified sea algae toxin (debromoaplysiatoxin)".
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responses were only measured by a dose at which nearly 50 percent of the mice died of toxicity (
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In order to introduce the ring system that characterizes debromoaplysiotoxin in this molecule,
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lines and binding activity for PKCδ, which plays a tumor suppressor role and is involved in
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is formed in 22 steps of common chemistry. This sulfone is coupled with a straightforward
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In 1980 there was a new outbreak of seaweed dermatitis on Oahu island Hawaii. Samples of
68:)-13-Hydroxy-9--3--4,14,16,16-tetramethyl-2,6,10,17-tetraoxatricyclooctadecane-7,11-dione 1370: 1308: 611: 556: 511: 451: 368: 1024: 936: 792:
Also, dermal diseases in the manatee population is likely to be caused by exposure to
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were observed. Death was observed by 1.2 g of each algae in the mouse toxicity assay.
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which has an anti-proliferative activity against various cancer cell lines in mice.
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approach to synthesize debromoaplysiatoxin from scratch was found to be effective.
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123O((C)CC1(C)C)(CC(O((C)O)(CC(OC(C2)(C)(O3)((CC(C=4C=CC=C(C4)O)OC)C))=O))=O)O
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is formed out of the alcohol by a quadruplet of reactions with respectively
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first, the yield of this idea has shown to be insufficient. Therefore, the
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anti-proliferation activity, and can be used as a therapy for cancer. The
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Osborne, N.J.T.; Webb, P.M.; Shaw, G.R. (November 2001). "The toxins of
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toxins reduced malignant transformation and DNA synthesis in cells.
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they found out that this was the causative agent of the dermatitis.
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Except where otherwise noted, data are given for materials in their
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to play a tumor suppressor role and to be involved in apoptosis.
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Although it would seem more logical to esterify the C.29 with a
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Carcinogenic, dermitis, oral and gastrointestinal inflammations
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calcium activated, phospholipid-dependent protein kinase C.
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revealed that this blue-green alga contained a mixture of
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is suggested to be involved in cancer cell growth, and
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Toxicity of aplysiatoxin and debromoaplysiatoxin from
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Debromoaplysiatoxin has activity against P-388 mouse
531:. In view of the fact that some blue-green alga like 1323: 1290: 1247: 472:is a toxic agent produced by the blue-green alga 1011:and their human and ecological health effects". 190: 89: 890: 888: 478:. This alga lives in marine waters and causes 1225: 8: 1098: 1096: 1232: 1218: 1210: 223: 145: 15: 656:2,3-dichloro-5,6-dicyano-1,4-benzoquinone 966: 964: 955:The Total Synthesis of Natural Products 834: 527:of a blue-green alga on the surface of 266: 244: 219: 602:(BOM), activating the sidechain with 7: 875:Japanese Journal of Cancer Research 579:derived anion interacts to form an 181: 165: 14: 1394: 1393: 296: 22: 953:Apsimon, John (February 1992). 454:(at 25 °C , 100 kPa). 974:Journal of Medicinal Chemistry 718:. The results showed that the 421:Occupational safety and health 302: 290: 1: 1117:10.1016/j.toxicon.2008.05.016 1025:10.1016/s0160-4120(01)00098-8 937:10.1016/s0040-4020(01)81547-7 909:10.1016/0041-0101(96)00014-1 856:10.1016/0041-0101(75)90034-3 1152:10.1001/archderm.114.9.1333 1075:Journal of Chemical Ecology 1451: 510:, debromoaplysiatoxin and 1389: 1087:10.1007/s10886-005-5800-5 1013:Environment International 637:-dicyclohexylcarbodiimide 448: 418: 413: 277: 257: 235: 73: 35: 30: 21: 652:1,1'-carbonyldiimidazole 520:Gracilaria coronopifolia 1140:Archives of Dermatology 608:tert-butyldiphenylsilyl 482:. Furthermore, it is a 1200:10.1093/carcin/8.1.179 1060:10.1126/science.403608 569:substitution reactions 957:. Wiley-Interscience. 786:Stylocheilus striatus 547:At first, a specific 17:Debromoaplysiatoxin 1366:Debromoaplysiatoxin 931:(46): 10531–10554. 733:lymphatic leukaemia 673:Mechanism of action 470:Debromoaplysiatoxin 345:Solubility in water 320: g·mol 127:Beilstein Reference 18: 1300:Cylindrospermopsin 751:Effects on animals 693:The activation of 667:macrolactonization 644:-chlorosuccinimide 480:seaweed dermatitis 458:Infobox references 16: 1407: 1406: 1054:(4289): 538–540. 1009:Lyngbya majuscula 986:10.1021/jm300566h 980:(11): 5614–5626. 497:Lyngbya majuscula 475:Lyngbya majuscula 466:Chemical compound 464: 463: 204:CompTox Dashboard 115:Interactive image 1442: 1397: 1396: 1234: 1227: 1220: 1211: 1204: 1203: 1182: 1176: 1175: 1162: 1156: 1155: 1146:(9): 1333–1335. 1135: 1129: 1128: 1100: 1091: 1090: 1081:(7): 1595–1606. 1070: 1064: 1063: 1043: 1037: 1036: 1004: 998: 997: 968: 959: 958: 950: 941: 940: 919: 913: 912: 892: 883: 882: 869: 860: 859: 839: 812:while swimming, 765:G. coronopifolia 695:protein kinase C 635: 623:β-keto thioester 529:G. coronopifolia 319: 304: 298: 292: 285:Chemical formula 228: 227: 212: 210: 194: 183: 169: 149: 117: 93: 26: 19: 1450: 1449: 1445: 1444: 1443: 1441: 1440: 1439: 1410: 1409: 1408: 1403: 1385: 1381:Aetokthonotoxin 1319: 1286: 1243: 1238: 1208: 1207: 1184: 1183: 1179: 1174:(4): 1529–1535. 1168:Cancer Research 1164: 1163: 1159: 1137: 1136: 1132: 1102: 1101: 1094: 1072: 1071: 1067: 1045: 1044: 1040: 1006: 1005: 1001: 970: 969: 962: 952: 951: 944: 921: 920: 916: 894: 893: 886: 871: 870: 863: 841: 840: 836: 831: 753: 739:The dehydrated 729: 711: 709:Available forms 675: 648:sodium chlorite 633: 619:Blaise reaction 600:benzyloxymethyl 596:p-methoxybenzyl 561:cyclohexylidene 541: 492: 467: 460: 455: 431: 405: 387: 347: 317: 307: 301: 295: 287: 273: 270: 265: 264: 253: 250: 249: 243: 242: 231: 213: 206: 197: 184: 172: 152: 129: 120: 107: 96: 83: 69: 12: 11: 5: 1448: 1446: 1438: 1437: 1432: 1427: 1422: 1412: 1411: 1405: 1404: 1402: 1401: 1390: 1387: 1386: 1384: 1383: 1378: 1373: 1371:Lyngbyatoxin-a 1368: 1363: 1358: 1353: 1348: 1343: 1338: 1333: 1327: 1325: 1321: 1320: 1318: 1317: 1312: 1309:Microcystin-LR 1302: 1296: 1294: 1288: 1287: 1285: 1284: 1279: 1274: 1269: 1264: 1259: 1253: 1251: 1245: 1244: 1239: 1237: 1236: 1229: 1222: 1214: 1206: 1205: 1194:(1): 179–181. 1188:Carcinogenesis 1177: 1157: 1130: 1111:(2): 385–388. 1092: 1065: 1038: 1019:(5): 381–392. 999: 960: 942: 914: 903:(7): 753–761. 884: 861: 833: 832: 830: 827: 752: 749: 728: 725: 710: 707: 674: 671: 612:esterification 557:n-butyllithium 540: 537: 512:lyngbyatoxin A 491: 488: 484:tumor promoter 465: 462: 461: 456: 452:standard state 449: 446: 445: 444:239.0±26.4 °C 442: 436: 435: 432: 429: 426: 425: 416: 415: 411: 410: 407: 403: 393: 392: 389: 385: 375: 374: 371: 369:Vapor pressure 365: 364: 361: 352: 351: 350:0.00911 mg/mL 348: 343: 340: 339: 336: 330: 329: 326: 322: 321: 315: 309: 308: 305: 299: 293: 288: 283: 280: 279: 275: 274: 272: 271: 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mmHg 372: 370: 367: 366: 362: 360: 359: 354: 353: 349: 346: 342: 341: 338:1.2±0.1 g/cm 337: 335: 332: 331: 328:White powder 327: 324: 323: 316: 314: 311: 310: 289: 286: 282: 281: 276: 267: 263: 256: 245: 241: 234: 226: 222: 218: 217: 215: 205: 201: 200: 193: 189: 188: 186: 180: 176: 175: 168: 164: 163: 161: 159: 156: 155: 148: 144: 143: 141: 139: 136: 135: 131: 128: 124: 123: 116: 112: 111: 109: 105: 100: 99: 92: 88: 87: 85: 82: 78: 77: 72: 67: 63: 59: 55: 51: 47: 43: 38: 34: 29: 25: 20: 1376:Microviridin 1365: 1331:Aplysiatoxin 1305:Microcystins 1292:Hepatotoxins 1267:Antillatoxin 1191: 1187: 1180: 1171: 1167: 1160: 1143: 1139: 1133: 1108: 1104: 1078: 1074: 1068: 1051: 1047: 1041: 1016: 1012: 1008: 1002: 977: 973: 954: 928: 924: 917: 900: 896: 878: 874: 850:(2): 95–96. 847: 843: 837: 823: 819: 813: 809: 805: 801: 797: 793: 791: 784: 781:L. majuscula 780: 778: 764: 762: 754: 744: 738: 730: 712: 692: 676: 660: 654:(CDI). With 641: 631: 627: 616: 585: 546: 542: 533:L. majuscula 532: 528: 518: 516: 508:aplysiatoxin 504:L. majuscula 503: 501: 496: 493: 473: 469: 468: 430:Main hazards 419: 400: 382: 357: 74:Identifiers 65: 61: 57: 53: 49: 45: 41: 1425:Phycotoxins 1420:Cyanotoxins 1346:Coibamide A 1341:Caldoramide 1336:Apratoxin A 1249:Neurotoxins 1241:Cyanotoxins 925:Tetrahedron 798:Lyngbya spp 685:hemi-acetal 565:acetic acid 440:Flash point 424:(OHS/OSH): 325:Appearance 278:Properties 1414:Categories 1277:Kalkitoxin 1262:Guanitoxin 1257:Anatoxin-a 829:References 598:(MPM) and 575:. Next, a 525:parasitism 313:Molar mass 138:ChemSpider 102:3D model ( 91:52423-28-6 81:CAS Number 37:IUPAC name 1361:Cyclamide 1315:Nodularin 1282:Saxitoxin 774:paralysis 716:apoptosis 663:hemiketal 592:arabidose 573:tosylates 539:Synthesis 1430:Lactones 1399:Category 1125:18585400 1033:11757852 994:22625994 770:Lethargy 727:Toxicity 720:dimethyl 577:dithiane 414:Hazards 397:Basicity 132:4624539 1435:Phenols 1105:Toxicon 1048:Science 897:Toxicon 844:Toxicon 814:Lyngbya 810:Lyngbya 806:Lyngbya 802:Lyngbya 794:Lyngbya 745:Lyngbya 646:(NCS), 639:(DCC), 581:alcohol 553:epoxide 549:sulfone 490:History 379:Acidity 334:Density 318:592.726 192:5352033 179:PubChem 147:4509004 1307:(e.g. 1123:  1031:  992:  588:xylose 262:SMILES 167:C05148 31:Names 1324:Other 783:into 571:with 391:9.36 240:InChI 104:JSmol 1272:BMAA 1121:PMID 1029:PMID 990:PMID 758:LD50 703:PKCδ 699:PKCα 650:and 590:and 363:4.2 356:log 158:KEGG 1196:doi 1148:doi 1144:114 1113:doi 1083:doi 1056:doi 1052:196 1021:doi 982:doi 933:doi 905:doi 852:doi 760:). 567:or 409:-3 209:EPA 182:CID 64:,14 60:,13 1416:: 1190:. 1172:43 1170:. 1142:. 1119:. 1109:52 1107:. 1095:^ 1079:31 1077:. 1050:. 1027:. 1017:27 1015:. 988:. 978:55 976:. 963:^ 945:^ 929:49 927:. 901:34 899:. 887:^ 879:76 877:. 864:^ 848:13 846:. 669:. 583:. 406:) 399:(p 388:) 381:(p 306:10 300:48 294:32 56:,9 52:,5 48:,4 44:,3 40:(1 1311:) 1233:e 1226:t 1219:v 1202:. 1198:: 1192:8 1154:. 1150:: 1127:. 1115:: 1089:. 1085:: 1062:. 1058:: 1035:. 1023:: 996:. 984:: 939:. 935:: 911:. 907:: 858:. 854:: 642:N 634:′ 632:N 630:, 628:N 404:b 401:K 386:a 383:K 358:P 303:O 297:H 291:C 211:) 207:( 106:) 66:R 62:S 58:R 54:S 50:S 46:R 42:S

Index

Debromoaplysiatoxin
IUPAC name
CAS Number
52423-28-6
JSmol
Interactive image
Beilstein Reference
ChemSpider
4509004
KEGG
C05148
PubChem
5352033
CompTox Dashboard
DTXSID80880084
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InChI
SMILES
Chemical formula
Molar mass
Density
Solubility in water
log P
Vapor pressure
Acidity
Basicity
Occupational safety and health
Flash point
standard state
Infobox references

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