Showing structure for methyl 2-[(1z,2s,3as,3bs,5as,6s,7r,9as,9bs,10r,11ar)-2-(acetyloxy)-7,10-dihydroxy-3a,3b,6,9a-tetramethyl-dodecahydro-2h-cyclopenta[a]phenanthren-1-ylidene]-6-methylhept-5-enoate