Synonyms: 5a-Pregnan-20-one, 5,6a-epoxy-3b-hydroxy- (6CI,7CI,8CI);5,6-Epoxy-5H-cyclopenta[a]phenanthrene, pregnan-20-one deriv.; 3b-Hydroxy-5,6a-epoxy-5a-pregnan-20-one; 5,6a-Epoxy-3b-hydroxy-5a-pregnan-20-one; 5a,6a-Epoxy-3b-hydroxy-5a-pregnan-20-one;NSC 63555