CHOLESTA-1,14-DIEN-3-ONE,7-(ACETYLOXY)-21,- 23-EPOXY-21,24,25-TRIHYDROXY-4,4,8- TRIMETHYL-11-[(2R)-2-METHYL-1-OXOBUTOXY]-,(5R,7R,11R,13R,17R,20S,21S,23R,24S)-