异名/同义词 | (17.ALPHA.,20E)-17,20-((1-METHOXYETHYLIDENE)BIS(OXY))-3-OXO-19-NORPREGNA-4,20-DIENE-21-CARBOXYLIC ACID METHYL ESTER 19-NORPREGNA-4,20-DIENE-21-CARBOXYLIC ACID, 17,20-((1-METHOXYETHYLIDENE)BIS(OXY))-3-OXO-, METHYL ESTER, (17.ALPHA.,20E)- YK11 YK-11
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