Chemical Name : Rac-13-ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (as per EP)

Smiles : CC[C@@]12[C@](CC[C@@]2(O)C#C)([H])[C@]([C@]3([H])CC1)([H])CCC4=C3CCC(C4)=O