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