4-Chloro-3-(difluoromethyl)-2-hydroxypyridine-6-carboxylic acid
6-Amino-4-(chloromethyl)-3-(difluoromethyl)pyridine-2-carboxylic acid
6-Iodo-4-methyl-3-(trifluoromethoxy)pyridine-2-acetic acid
Ethyl 5-bromo-4-iodo-3-(trifluoromethoxy)pyridine-2-carboxylate