4-(Fluoromethyl)-2-methyl-5-(trifluoromethoxy)pyridine-3-carboxaldehyde
5-(Fluoromethyl)-3-methyl-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
3-(Fluoromethyl)-5-methyl-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
5-(Fluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine-3-carboxaldehyde