2 6 dibromopyridine 4 carboxylic acid July 8, 2019 16 32 64 128 2 6 dichloropyridine 4 carboxylic acid 1 4 dibromobutane 2 6-dibromopyridine 2 5-dibromopyridine 2 6-dibenzyloxy-3-bromo-pyridine
