[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an ethylenediamine derivative in which each nitrogen carries two methyl substituents. It is widely employed both as a ligand for metal ions and as a catalyst in organic polymerisation. It has a role as a chelator and a catalyst."}, {"from": "gpt", "value": "[C][N][Branch1][C][C][C][C][N][Branch1][C][C][C]"}]