Showing structure for (1's,2s,2'r,7'r,9'r,11'r)-11'-(acetyloxy)-1',5'-dimethyl-8'-oxaspiro[oxirane-2,12'-tricyclo[7.2.1.0²,⁷]dodecan]-5'-en-2'-ylmethyl (2e)-5-hydroxy-3-methylpent-2-enoate