Chemical Name : 13-Ethyl-10,17-dihydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one (as per EP)

Smiles : CC[C@@]1([C@]2(O)C#C)[C@](CC2)([H])[C@@](CCC3=CC4=O)([H])[C@]([C@]3(CC4)O)([H])CC1