[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a Central Nervous System Stimulant. The physiologic effect of dexmethylphenidate is by means of Central Nervous System Stimulation."}, {"from": "gpt", "value": "[C][O][C][=Branch1][C][=O][C@@H1][Branch1][=Branch2][C@H1][C][C][C][C][N][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]