[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a lysine derivative in which the N(epsilon) of the amino acid carries a 2-carboxyethyl group. It is a lysine derivative and a non-proteinogenic alpha-amino acid."}, {"from": "gpt", "value": "[C][Branch1][O][C][C][N][C][C][C][=Branch1][C][=O][O][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]