Chemical Name : 17-hydroxy-19-nor-17α-pregna-4,6-dien-20-yn-3-one (as per EP)

Smiles : O[C@@]1(C#C)CC[C@@]2([H])[C@]3([H])C=CC4=CC(CC[C@]4([H])[C@@]3([H])CC[C@]12C)=O