4-(Difluoromethyl)-2-methyl-6-(trifluoromethoxy)pyridine-3-carboxylic acid
3-(Difluoromethyl)-5-methyl-6-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
5-Iodo-2-methoxy-4-(trifluoromethoxy)pyridine