Methyl 4-amino-2-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate
6-Amino-2-methyl-3-(trifluoromethoxy)pyridine-4-carboxylic acid
Methyl 3-amino-5-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
2-Amino-4-methyl-5-(trifluoromethoxy)pyridine-3-carboxylic acid