4-Amino-3-(aminomethyl)-6-(difluoromethyl)pyridine-2-carboxylic acid
5-Amino-2-(bromomethyl)-3-(difluoromethyl)pyridine-6-carboxylic acid
2-Amino-3-(aminomethyl)-6-(difluoromethyl)-4-methylpyridine
3-Amino-2-(bromomethyl)-5-(difluoromethyl)-4-nitropyridine