3-(Difluoromethyl)-5-nitro-2-(trifluoromethyl)pyridine-6-carboxylic acid
Methyl 5-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-3-carboxylate
Methyl 5-(difluoromethyl)-4-nitro-3-(trifluoromethyl)pyridine-2-carboxylate
Methyl 3-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-carboxylate