Drospirenone - Impurity B

NA

7β-(Hydroxymethyl)-3-oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregn-4-ene-21,17-carbolactone; (4aR,4bS,6aS,7S,7aS,8aS,8bS,8cR,9S)-9-(hydroxymethyl)-4a,6a-dimethyl-3',4,4a,4b,4',6,6a,7a,8,8a,8b,8c,9,10-tetradecahydro-3H,5'H-spiro[cyclopropa[4,5]cyclopenta[1,2-a]phenanthrene-7,2'-furan]-2,5'(5H)-dione; 7-Hydroxymethyl drospirenone; 17-Hydroxy-7β-hydroxymethyl-15β,16β-methylene-3-oxo-17α-pregn-4-ene-21-carboxylic acid, γ-lactone (USP);