[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an alpha-amino acid consisting of lysine having an oxo group in place of the side-chain amino group. It is a tautomer of an allysine zwitterion."}, {"from": "gpt", "value": "[C][Branch1][Ring2][C][C][=O][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]