Methyl 5-amino-4-nitro-2-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 3-amino-4-nitro-5-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 2-amino-6-nitro-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2-amino-5-nitro-4-(trifluoromethoxy)pyridine-3-carboxylate