Methyl 3-amino-2-(difluoromethyl)-5-(trifluoromethyl)pyridine-6-acetate
Methyl 4-amino-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-6-acetate
Methyl 4-amino-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-6-acetate
Methyl 3-amino-2-(difluoromethyl)-4-(trifluoromethyl)pyridine-5-acetate