Showing structure for (1's,2s,2'r,7'r,9'r,10'r,11's)-10'-hydroxy-1',2',5'-trimethyl-8'-oxaspiro[oxirane-2,12'-tricyclo[7.2.1.0²,⁷]dodecan]-5'-en-11'-yl (2z)-but-2-enoate