[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a methylquinoline carrying a methyl substituent at position 4. It has a role as a mutagen."}, {"from": "gpt", "value": "[C][C][=C][C][=N][C][=C][C][=C][C][=C][Ring1][#Branch2][Ring1][=Branch1]"}]