7-oxopodocarpa-8,11,13-triene-12,13-diyl diacetate 9(1H)-phenanthrenone, 6,7-bis(acetyloxy)-2,3,4,4a,10,10a-hexahydro-1,1,4a-trimethyl- InChI=1/C21H26O5/c1-12(22)25-17-9-14-15(10-18(17)26-13(2)23)21(5)8-6-7-20(3,4)19(21)11-16(14)24/h9-10,19H,6-8,11H2,1-5H