6-Amino-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetic acid
2-Amino-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetic acid
3-Bromo-5-chloro-4-nitro-2-(trifluoromethoxy)pyridine
2-Amino-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-acetic acid