Chemical Name : 3,17-Dihydroxy-19-nor-17α-pregna-1,3,5(10)-trien-20-yn-16-one (as per EP)

Smiles : C[C@@]1([C@]2(O)C#C)[C@](CC2=O)([H])[C@@](CCC3=CC(O)=CC=C43)([H])[C@]4([H])CC1