56196-59-9 (Z)-2-Methyl-2-butenoic acid (1aR)-1aβ,2,3,3a,4,5,5aα,6,7,8aβ,8bα,8c-dodecahydro-3aβ,8cβ-dimethyl-6-methylene-7-oxooxireno[7,8]naphtho[1,2-b]furan-3α-yl ester 56197-49-0 (2S,1S,3R,4bS,8aS,9S,10S)-3-Acetoxy-4b,5,6,7,8,8a,9,10-octahydro-9,10-dihydroxy-2,4b,8,8-tetramethylspiro[cyclopropane-1,2(1H)-phenanthrene]-1,4(3H)-dione