3-(Bromomethyl)-2-methyl-5-(trifluoromethoxy)pyridine-4-carboxylic acid
5-(Bromomethyl)-4-methyl-3-(trifluoromethoxy)pyridine-2-carboxylic acid
2-(Bromomethyl)-6-methyl-5-(trifluoromethoxy)pyridine-3-carboxylic acid
3-(Bromomethyl)-4-methyl-2-(trifluoromethoxy)pyridine-6-carboxylic acid