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E891945 (4β,5β,17α)- 4,5-Epoxy-13-ethyl-17-hydroxy-18,19-dinorpregn-20-yn-3-one
E891945 (4β,5β,17α)- 4,5-Epoxy-13-ethyl-17-hydroxy-18,19-dinorpregn-20-yn-3-one