Ethyl 3-amino-6-(aminomethyl)-2-(difluoromethyl)pyridine-5-carboxylate
2-Amino-5-(difluoromethyl)-6-methyl-3-(trifluoromethyl)pyridine
Ethyl 5-amino-2-(aminomethyl)-3-(difluoromethyl)pyridine-6-carboxylate
Ethyl 4-amino-3-(aminomethyl)-6-(difluoromethyl)pyridine-2-carboxylate