[{"from": "human", "value": "Describe this molecule. [C][O][C@H1][C@@H1][Branch2][Ring2][=Branch1][C][C@@H1][C][N][C][C][C][=C][Branch1][P][C@H1][Ring1][=Branch1][C][C@@H1][Ring1][#Branch2][C@@H1][Ring1][=C][C][=Branch1][C][=O][O][C][N][C][=C][C][=C][C][=C][Ring1][P][Ring1][=Branch1][O][C][=Branch1][C][=O][C][=C][C][=Branch1][=C][=C][Branch1][=Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][C][O][C][O][C]"}, {"from": "gpt", "value": "The molecule is an ester alkaloid derived from Rauwolfia canescens with antihypertensive activity. Deserpidine is a competitive inhibitor of the angiotensin converting enzyme (ACE). By competing with angiotensin I for ACE, deserpidine blocks the conversion of angiotensin I to angiotensin II, which is a potent vasoconstrictor. Reduced level of serum angiotensin II causes a decrease in blood pressure. Deserpidine also decreases angiotensin II-induced aldosterone secretion by the adrenal cortex."}]