1β-Acetoxy-7α-hydroxysandaracopimara-8(14),15-diene

(4R)-7α-Ethenyl-1,2,3,4,4a,4bα,5,6,7,9,10,10aα-dodecahydro-1,1,4aβ,7-tetramethyl-4β,9α-phenanthrenediol 4-acetate