CC1=C[C@@H](O)[C@]23O[C@@]4(C[C@H]2C)OC(=O)C(C)=C4C=C13	(1S,10R,11S,12R)-10-hydroxy-4,8,12-trimethyl-2,14-dioxatetracyclo[9.2.1.01,5.07,11]tetradeca-4,6,8-trien-3-one