[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a leucine derivative and a tert-butyl ester."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C@@H1][Branch1][=C][C][=Branch1][C][=O][O][C][Branch1][C][C][Branch1][C][C][C][N][C][=Branch1][C][=O][C][=C][Branch1][=Branch1][N][C][=N][Ring1][Branch1][C][=Branch1][C][=O][N][C][C][C][C][C][N][C][=Branch1][C][=O][O][C][Branch1][C][C][Branch1][C][C][C]"}]