5-Bromopyridine-2-carbaldehyde5-Bromopyridine-2-carboxaldehyde 97%5-Bromopicolinaldehyde5-Bromo-2-formylpyridine5-溴-2-吡啶甲醛5-Bromo-2-pyridinecarboxaldehyde5-Bromo-2-picolinaldehyde5-溴-吡啶-2-甲醛5-Bromo-pyridine-2-carbaldehyde5-bromopicolinaldehyde5-溴吡啶-2-甲醛5-Bromopyridine-2-carboxaldehyde