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

Smiles : C#C[C@]1(OC(C)=O)CC[C@@]2([H])[C@]3([H])CC(C4=CC(CC[C@]4([H])[C@@]3([H])CC[C@]12C)=O)=O