Chemical Name : 3,17-Dihydroxy-19-nor-17α-pregna-1,3,5(10)-trien-20-yn-6-one (as per EP); 19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol-6-one (as per USP)

Smiles : C#C[C@]1(O)CC[C@@]2([H])[C@]3([H])CC(C4=C(C=CC(O)=C4)[C@@]3([H])CC[C@]12C)=O