A-Homo-24-nor-4-oxachola-14,20,22-trien-3-one,1-(acetyloxy)-12-[[2-(acetyloxy)-3-methyl-1-oxopentyl]oxy]-21,23-epoxy-4a-(hydroxymethyl)-7-(2-hydroxy-3-methyl-1-oxobutoxy)-4a,8-dimethyl-,(1a,4ab,5a,7a,12a,13a,17a)-