122271-91-4 Hemibrevetoxin B Oxepino(3,2-b)pyrano(2',3':5,6)pyrano(2,3-f)oxepin-2-propanal, 9-((3Z)-3,5-hexadienyl)hexadecahydro-4,10-dihydroxy-5a,10-dimethyl-alpha-methylene-, (2R,4S,4aS,5aR,7aS,9R,10S,12aR,13aS,14aR)- Oxepino(3,2-b)pyrano(2',3':5,6)pyrano(2,3-f)oxepin-2-propanal, 9-(3,5-hexadienyl)hexadecahydro-4,10-dihydroxy-5a,10-dimethyl-alpha- methylene-, (2R-(2alpha,4alpha,4abeta,5abeta,7abeta,9alpha(Z),10beta,12aalpha,13aalpha,14aalpha))-