11(13)-dien-12-oicacid,8-beta-hydroxy-eudesma-4(14gamma-lactone

(3ar,4as,8ar,9ar)-8a-methyl-3,5-dimethylene-decahydro-naphtho[2,3-b]furan-2-one

(3aR)-3aα,4,4aα,5,6,7,8,8a,9,9aα-Decahydro-3,5-bismethylene-8aβ-methylnaphtho[2,3-b]furan-2(3H)-one

(3aR,4aα,9aα)-3a,4,4a,5,6,7,8,8a,9,9a-Decahydro-8aβ-methyl-3,5-bis(methylene)naphtho[2,3-b]furan-2(3H)-one