17alpha-Methyl-1,7-propionylestra-4,9-dien-3-one 34184-77-5 Estra-4,9-dien-3-one, 17-alpha-methyl-17-propionyl- Estra-4,9-dien-3-one, 17-methyl-17-(1-oxopropyl)-, (17-beta)- (9CI)