SMILES: CC(=O)O[C@H]1CC[C@@H]2[C@H]3CC[C@]4([C@H]([C@@H]3CCC2=C1)CC[C@]4(C#C)OC(=O)C)C
Description: The molecule is a steroid ester and a terminal acetylenic compound. It has a role as an estrogen receptor modulator, a contraceptive drug and a synthetic oral contraceptive. It derives from an ethynodiol.