5-Amino-3-(difluoromethyl)-4-nitropyridine-2-acetic acid
2-Amino-5-(aminomethyl)-3-(difluoromethyl)-4-(trifluoromethyl)pyridine
3-Amino-4-(difluoromethyl)-2-nitropyridine-5-acetic acid
6-Amino-4-(aminomethyl)-3-(difluoromethyl)-2-(trifluoromethyl)pyridine