5-Hydroxy-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-carboxylic acid
4-Hydroxy-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-carboxylic acid
2-Iodo-3-nitro-5-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
3-(Difluoromethyl)-6-iodo-2-nitro-4-(trifluoromethoxy)pyridine