6aH-Cyclopenta[7,8]cyclopropa[4,4a]naphtho[2,3-b]furan-6a-propanoic acid, 3-[(1R,4E)-1,5-dimethyl-6-oxo-4-hexen-1-yl]tetradecahydro-3a,10b-dimethyl-7-methylene-8-oxo-, (3R,3aR,5aS,6aR,6bR,9aR,10aS,10bS)-

Coronalolide

10bH-Cyclopenta[7,8]cyclopropa[4,4a]naphtho[2,3-b]furan-10b-propanoicacid,4-[(1R,4E)-1,5-dimethyl-6-oxo-4-hexenyl]tetradecahydro-3a,6a-dimethyl-10-methylene-9-oxo-,(1aS,3aR,4R,6aS,6bS,7aR,10aR,10bR)- (9CI)