[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C@][C][C][=Branch1][C][=C][C@H1][C@H1][Branch1][=C][C@@H1][Ring1][#Branch1][C][C][C@][Ring1][#Branch2][Branch1][Ring1][C][#C][O][C][C][C][=C][C][=Branch1][C][=O][C][C][C@H1][Ring2][Ring1][C][Ring1][#Branch1]"}, {"from": "gpt", "value": "The molecule is a synthetic form of the naturally occurring female sex hormone progesterone. Etonogestrel binds to the cytoplasmic progesterone receptors in the reproductive system and subsequently activates progesterone receptor mediated gene expression. As a result of the negative feedback mechanism, luteinizing hormone (LH) release is inhibited, which leads to an inhibition of ovulation and an alteration in the cervical mucus and endometrium."}]