4287 Lyngbyatoxin-a Lyngbyatoxin-a is a cyanotoxin produced by certain cyanobacteria species, notably Moorea producens (formerly classified as Lyngbya majuscula). It is used as a defensive secretion to protect this cyanobacteria from predation by fish, being a potent irritant and vesicant, as well as a carcinogen. Low concentrations more commonly encountered cause milder symptoms, known as seaweed dermatitis. 91706 C27H39N3O2 White powder. Not listed by IARC. Lyngbyatoxin-a is a cyanotoxin produced by certain cyanobacteria species, notably Moorea producens (formerly classified as Lyngbya majuscula). It is used as a defensive secretion to protect this cyanobacteria from predation by fish, being a potent irritant and vesicant, as well as a carcinogen. 2014-08-29T05:56:17Z 2026-05-21T00:20:51Z Lyngbyatoxin-a true [H][C@@]1(CO)CC2=CNC3=C(C=CC(N(C)[C@@]([H])(C(C)C)C(O)=N1)=C23)[C@](C)(CCC=C(C)C)C=C C27H39N3O2 InChI=1S/C27H39N3O2/c1-8-27(6,13-9-10-17(2)3)21-11-12-22-23-19(15-28-24(21)23)14-20(16-31)29-26(32)25(18(4)5)30(22)7/h8,10-12,15,18,20,25,28,31H,1,9,13-14,16H2,2-7H3,(H,29,32)/t20-,25-,27-/m0/s1 KISDGNGREAJPQR-OICBGKIFSA-N 437.6175 437.304227507 Exogenous Solid 10472344 CHEM003193 DTXSID90880015 NS00075614 71.85000000000001 134.7735 51.32320999532719 7 4 3 3.149220750010379 5.203897585381636 0 3 5.22 -5.00 4.36e-03 g/l