1,7-Dioxaspiro(5.5)undec-10-ene-2-propanoic acid, alpha,5-dihydroxy-alpha,10-dimethyl-8-((1R,2E)-1-methyl-3-((2R,4'aR,5R,6'S,8'R,8'aS)-octahydro-8'-hydroxy-6'-((1S,3S)-1-hydroxy-3-((2S,3R,6S)-3-methyl-1,7-dioxaspiro(5.5)undec-2-yl)butyl)-7'-methylenespiro(furan-2(3H),2'(3'H)-pyrano(3,2-b)pyran)-5-yl)-2-propenyl)-, (2E,4E)-2-methyl-7-(((3Z)-7,11,13-trihydroxy-1-oxo-9,12,14-tris(sulfooxy)-3-tetradecenyl)oxy)-2,4-heptadienyl ester, (alphaR,2S,5R,6R,8S)- 162795-98-4 Dinophysistoxin 4 Dinophysistoxin-4 Dtx-4 toxin