Chemical Name : 3-Oxo-19-nor-17α-pregn-4-en-20-yn-17-yl acetate (as per EP); 17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one acetate (as per USP)

Smiles : O=C1CC[C@]2([H])[C@@]3([H])CC[C@]4(C)[C@@](C#C)(OC(C)=O)CC[C@@]4([H])[C@]3([H])CCC2=C1