[{"from": "human", "value": "Could you provide a description of this molecule? [C][N][C][=N][C][=C][Ring1][Branch1][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][Ring1][Branch2][C]"}, {"from": "gpt", "value": "The molecule is the principle alkaloid in Theobroma cacao (the cacao bean) and other plants. A xanthine alkaloid that is used as a bronchodilator and as a vasodilator. It has a weaker diuretic activity than theophylline and is also a less powerful stimulant of smooth muscle. It has practically no stimulant effect on the central nervous system. It was formerly used as a diuretic and in the treatment of angina pectoris and hypertension. (From Martindale, The Extra Pharmacopoeia, 30th ed, pp1318-9)"}]