CO[C@]12/C=C(/C)CC[C@@H]3O[C@@]3(C)CC/C=C(\C)CC[C@]13O[C@]3(C)CO2	(1R,4E,8S,10S,13Z,15S,18R)-15-methoxy-4,8,13,18-tetramethyl-9,16,19-trioxatetracyclo[13.4.0.0^{1,18}.0^{8,10}]nonadeca-4,13-diene