(1-oxidopyridin-1-ium-2-yl)-phenylmethanone

2-(2-氟苯甲酰)吡啶

5-苯基-5-吡啶-2-基-咪唑烷-2,4-二酮

[phenyl(pyridin-2-yl)methylidene]hydrazine

1-phenylimidazo[1,5-a]pyridine