18-hydroxypimara-7,15-dien-3-one 2(1H)-phenanthrenone, 7-ethenyl-3,4,4a,4b,5,6,7,8,10,10a-decahydro-1-(hydroxymethyl)-1,4a,7-trimethyl- InChI=1/C20H30O2/c1-5-18(2)10-8-15-14(12-18)6-7-16-19(15,3)11-9-17(22)20(16,4)13-21/h5-6,15-16,21H,1,7-13H2,2-4H