4-(Fluoromethyl)-2-methoxy-5-methyl-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-3-methoxy-2-methyl-5-(trifluoromethoxy)pyridine
5-(Fluoromethyl)-3-methoxy-2-methyl-4-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-6-methoxy-3-methyl-2-(trifluoromethoxy)pyridine