Chemical Name : 17-hydroxy-7α-methyl-19-nor-10ξ,17α-pregn-4-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=CC(CCC4([H])[C@@]3([H])CC[C@]12C)=O