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Drospirenone Impurity G Drospirodone EP Impurity G Drospirenone EP Impurity G 7-ChloroMethyl Drospirenone Trospirone ethinylestradiol EP impurity G Drospirenone Impurity 7（Drospirenone EP Impurity G） 7β-(Chloromethyl)-3-oxo-15α,16α-dihydro-3'H-cyclopropa[15,16]-17α-pregn-4-ene-21,17-carbolactone (3' (7β,15α,16α,17α)-7-(ChloroMethyl)-15,16-dihydro-17-hydroxy-3-oxo-3'H-cyclopropa[15,16]pregna-4,15-diene-21-carboxylic Acid γ-Lactone 3'H-Cyclopropa[15,16]pregna-4,15-diene-21-carboxylic acid, 7-(chloromethyl)-15,16-dihydro-17-hydroxy-3-oxo-, γ-lactone, (7β,15α,16α,17α)- 7beta-(Chloromethyl)-3-oxo-15alpha,16alpha-dihydro-3'H-cyclopropa[15,16]-17alpha-pregn-4-ene-21,17-carbolactone (3'-Chloro-3',6-secodrospirenone) (2'S,4aR,4bS,6aS,7aS,8aS,8bS,8cR,9S)-9-(Chloromethyl)-4a,6a-dimethyl-4,4a,4b,5,6,6a,8,8a,8b,8c,9,10-dodecahydro-2H,3'H-spiro[cyclopropa[4,5]cyclopenta[1,2-a]phenanthrene-7,2'-furan]-2,5'(3H,4'H,7aH)-dione (Drospirenone Impurity)