(5Z,7E,24E)-(1S,3R)-1,3-bis[(t-butyldimethylsilyl)oxy]-22-phenylsulfonyl-24-methyl-24a-homo-26,27-diethyl-9,10-secocholesta-5,7,10(19),24-tetraen-23,25-diol

(5Z,7E,24E)-(1S,3R)-1,3-bis[(t-butyldimethylsilyl)oxy]-22-phenylsulfonyl-24-methyl-24a-homo-26,27-di-n-propyl-9,10-secocholesta-5,7,10(19),24-tetraen-23,25-diol