[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][O][C][Branch1][C][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a L-leucine derivative obtained by the substitution of a t-butoxycarbonyl group on the nitrogen atom. It is a carbamate ester and a L-leucine derivative."}]