3-(Chloromethyl)-6-(difluoromethyl)-4-methoxypyridine-2-carboxylic acid
4-(Difluoromethyl)-6-methyl-2-(trifluoromethoxy)pyridine-3-acetic acid
5-(Chloromethyl)-2-(difluoromethyl)-3-methoxypyridine-4-carboxylic acid
4-(Difluoromethyl)-2-methyl-5-(trifluoromethoxy)pyridine-3-acetic acid