[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=O][C@][Branch2][Branch1][C][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring2][Branch2][C][C@@H1][Branch2][Ring1][Ring2][C][=C][C][C][C][=Branch1][C][=O][C][=C][Ring1][#Branch1][C][C][C@@H1][Ring1][#C][Ring1][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][Branch1][C][C][C][C][O]"}, {"from": "gpt", "value": "The molecule is a selective progesterone receptor modulator with anti-progesterone activity. Ulipristal binds to the progesterone receptor (PR), thereby inhibiting PR-mediated gene expression, and interfering with progesterone activity in the reproductive system. As a result, this agent may suppress the growth of uterine leiomyomatosis. Furthermore, by inhibiting or delaying ovulation and effecting endometrial tissue, ulipristal can be used as an emergency contraception."}]