6-bromo-2-(3,4-dichlorophenyl)-3,4-dihydro-2H-pyrano[2,3-b]pyridine

6-bromo-2-(3,4-dichlorophenyl)-4H-pyrano[2,3-b]pyridine

2-(3,4-dichlorophenyl)-3,4-dihydro-2H-pyrano[2,3-b]pyridine

5-溴-6-甲氧基烟醛

5-溴-2-甲氧基吡啶-3-甲醛