[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a quinoxaline derivative in which the quinoxaline (1,4-naphthyridine) skeleton is substituted at C-2 with a methyl group."}, {"from": "gpt", "value": "[C][C][=N][C][=C][C][=C][C][=C][Ring1][=Branch1][N][=C][Ring1][#Branch2]"}]