4-Methoxy-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
4-Methoxy-3-nitro-2-(trifluoromethoxy)pyridine-5-carboxaldehyde
3-(Difluoromethyl)-2-iodo-4-(trifluoromethoxy)pyridine-5-carboxylic acid
6-(Difluoromethyl)-2-iodo-4-(trifluoromethoxy)pyridine-3-carboxylic acid