3-(Fluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridine
3-(Fluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-4-(difluoromethyl)-2-methoxypyridine-3-carboxylic acid
3-(Chloromethyl)-4-(difluoromethyl)-5-methoxypyridine-2-carboxylic acid