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13-Ethyl-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (Levo Norgestrel Impurity)
Cas No.32419-58-2 Brand:TRC 
Molecular Formula:C21H30O No.:E916950 
Spec Price(RMB) Stock Memo
2.5mg Inquiry 3-4周 Colorless Semi-Solid
25mg Inquiry 3-4周 Colorless Semi-Solid
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