[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a quinolizine. It is a tautomer of a 4H-quinolizine and a 2H-quinolizine."}, {"from": "gpt", "value": "[C][=C][C][C][=C][C][=C][N][Ring1][=Branch1][C][=C][Ring1][#Branch2]"}]