Chemical Name : 17-hydroxy-7β-methyl-19-nor-17α-pregn-5(10)-en-20-yn-3-one (as per EP)

Smiles : C#C[C@]1(O)CC[C@@]2([H])[C@]3([H])[C@@H](C)CC4=C(CCC(C4)=O)[C@@]3([H])CC[C@]12C