21,23:24,25-Diepoxy-21-hydroxylanost-7-en-3-one (13alpha,14beta,17alpha,20S,21R,23R,24R)- 6553-27-1 Lanost-7-en-3-one, 21,23:24,25-diepoxy-21-hydroxy-, (13alpha,14beta,17alpha,20S,21R,23R,24R)-