1(2H)-Phenanthrenone,6,10-bis(acetyloxy)-4,5-bis(benzoyloxy)-2-ethenyldodecahydro-7,10a-dihydroxy-2,4b,8,8-tetramethyl-,[2R-(2a,4a,4aa,4bb,5a,6a,7a,8aa,10a,10ab)]-