3-Amino-2-(difluoromethyl)-6-fluoropyridine-4-carboxylic acid
3-Amino-2-(difluoromethyl)-4-fluoropyridine-6-carboxylic acid
2-Amino-6-(difluoromethyl)-5-fluoropyridine-3-carboxylic acid
2-Amino-3-(aminomethyl)-4-(difluoromethyl)pyridine-5-carboxylic acid