4-(Difluoromethyl)pyridine-3-sulfonyl chloride
Methyl 2-(aminomethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 3-(aminomethyl)-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-acetate
Methyl 6-(aminomethyl)-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetate