D-Homo-24-nor-17-oxachola-14,20,22-trien-16-one,3,6-bis(acetyloxy)-21,23-epoxy-7-hydroxy-4,4,8-trimethyl-1-[(1-oxo-3-phenyl-2-propenyl)oxy]-,(1a,3a,6a,7a,13a,17aa)-