[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][Branch1][=Branch1][N][C][=N][Ring1][Branch1][C][C][N]"}, {"from": "gpt", "value": "The molecule is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter."}]