3-Amino-2-(difluoromethyl)-5-fluoropyridine-4-carboxylic acid
6-Amino-2-(difluoromethyl)-3-fluoropyridine-4-carboxylic acid
2-Amino-6-(difluoromethyl)-4-fluoropyridine-3-carboxylic acid
4-(Aminomethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid