5-(Difluoromethyl)-4-nitro-3-(trifluoromethyl)pyridine-2-acetic acid
3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-acetic acid
Methyl 4-(difluoromethyl)-2-nitro-3-(trifluoromethyl)pyridine-6-acetate
Methyl 5-(difluoromethyl)-3-nitro-2-(trifluoromethyl)pyridine-4-acetate