2-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxylic acid
Ethyl 2-(difluoromethyl)-4-hydroxy-5-(trifluoromethoxy)pyridine-3-acetate
2-Hydroxy-3-nitro-4-(trifluoromethoxy)pyridine-5-carboxylic acid
Ethyl 2-(difluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-5-acetate