Chemical Name : 3-ethynyl-19-nor-17α-pregna-3,5-dien-20-yn-17-ol (as per EP)

Smiles : C[C@@]1([C@]2(O)C#C)[C@](CC2)([H])[C@@](CC=C3[C@]4([H])CCC(C#C)=C3)([H])[C@]4([H])CC1