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