IUPAC:(2R,3R,3aR,4S,7S,7aR)-3-(acetyloxy)-7,7a-dimethyl-4'-methylidene-2'-oxo-octahydrospiro[indene-2,3'-oxolan]-4-yl (2Z)-2-methylbut-2-enoate
IUPAC:(2R,3R,3aR,4S,7S,7aR)-3-(acetyloxy)-7,7a-dimethyl-4'-methylidene-2'-oxo-octahydrospiro[indene-2,3'-oxolan]-4-yl (2Z)-2-methylbut-2-enoate