6β,7β:15β,16β-Dimethylene-5β-hydroxy-3-oxo-17α-pregnane-21,17-carbolactone ; CAS # 197721-70-3 ;

3-Oxo-6α,7α,15α,16α-tetrahydro-3′H,3″H-dicyclopropa[6,7:15,16]-17α-pregn-4-en-21,17-carbolactone ; CAS # 67392-87-4 ;

Drospirenone BP Impurity A ; 6,7-Desmethylene Drospirenone ; 3-Oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregn4-ene-21,17-carbolactone ; CAS # 67372-68-3 ;

Drospirenone BP Impurity B ; 7β-Hydroxymethyl Drospirenone ; 7β-(Hydroxymethyl)-3-oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregn-4-ene-21,17-carbolactone ;

Drospirenone BP Impurity C ; 17-Keto Drospirenone ; 6α,7α,15α,16α-Tetrahydro-3′H,3″H-dicyclopropa[6,7:15,16]androst-4-ene-3,17-dione ; CAS # 116298-21-6 ;

Δ6-Drospirenone ; Drospirenone BP Impurity D ; 6,7-Demethylene-6,7-dehydro Drospirenone ; 3-Oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregna-4,6-diene-21,17-carbolactone ; CAS # 67372-69-4 ;

Drospirenone BP Impurity E ; Drospirenone USP RC A ; 17-Epidrospirenone ; 17R-Drospirenone ; 3-Oxo-6α,7α,15α,16α-tetrahydro-3′H,3″H-dicyclopropa[6,7:15,16]pregn-4-ene-21,17-carbolactone ; CAS # 90457-65-1 ;

Drospirenone BP Impurity F ; 3″-16-Secodrospirenone ; 15β-Methyl Drospirenone ; 15β-Methyl-3-oxo-6α,7α-dihydro-3′H-cyclopropa[6,7]17α-pregn-4-ene-21,17-carbolactone ;

Drospirenone BP Impurity G ; 3′-Chloro-3′,6-secodrospirenone ; 7-Chloromethyl Drospirenone ; 7β-(Chloromethyl)-3-oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregn-4-ene-21,17-carbolactone ; CAS # 932388-90-4 ;

Drospirenone BP Impurity H ; 3′-Chloro-3′,6-seco-17-Epidrospirenone ; 7-Chloromethyl 17R-Drospirenone ; 7β-(Chloromethyl)-3-oxo-15α,16α-dihydro-3′H-cyclopropa[15,16]pregn-4-ene-21,17-carbolactone ; CAS # 932388-89-1 ;

Drospirenone BP Impurity I ; 7β-Hydroxymethyldiene Drospirenone ; 7β-(Hydroxymethyl)-15α,16α-dihydro-3′H-cyclopropa[15,16]-17α-pregna-3,5-diene-21,17carbolactone ;

3-Deoxo-4,5-Dihydro-5β-Hydroxy Drospirenone ; 6β,7β:15β,16β-Dimethylene-5β-hydroxy-17α-pregnane-21,17-carbolactone ; (2’S,5R,6R,7R,8R,9S,10R,13S,14S,15S,16S)-Octadecahydro-5-hydroxy-10,13-dimethylspiro[17H-dicyclopropa[6

Drospirenone BP Impurity K ; 6α,7α-Drospirenone ; 3-Oxo-6β,7β,15α,16α-tetrahydro-3′H,3″H-dicyclopropa[6,7:15,16]-17α-pregn-4-ene-21,17-carbolactone ; CAS # 889652-31-7 ;