Chemical Name : 13-Ethyl-3,17-dihydroxy-18,19-dinor-17α-pregna-1,3,5(10),15-tetraen-20-yn-6-one (as per EP)

Smiles : OC1=CC(C(C[C@]2([H])[C@]3([H])CC[C@@]4(CC)[C@@]2([H])C=C[C@@]4(O)C#C)=O)=C3C=C1