110078-66-5 6-beta,7-beta-Epoxy-17-alpha-hydroxy-3-oxopregn-4-ene-21-carboxylic acid gamma-lactone 6-beta,7-beta-Epoxy-canrenone BRN 5136576 Pregn-4-ene-21-carboxylic acid, 6,7-epoxy-17-hydroxy-3-oxo-, gamma-lactone, (6-beta,7-beta,17-alpha)-