Chemical Name : 6β-Hydroxy-3-oxo-19-nor-17α-pregn-4-en-20-yn-17-yl acetate (as per EP)

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