[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter."}, {"from": "gpt", "value": "[C][=C][Branch1][=Branch1][N][C][=N][Ring1][Branch1][C][C][N]"}]