4-Amino-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetic acid
4-Bromo-2-cyano-3-(trifluoromethoxy)pyridine-6-carboxylic acid
3-Amino-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid
3-Amino-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid