2,3-PYRIDINEDICARBOXYLIC ACID;QUINOLINIC ACID;3,5-PYRIDINEDICARBOXYLIC ACID;2,6-PYRIDINEDICARBOXYLIC ACID;2,3-PYRIDINEDICARBOXYLIC ANHYDRIDE;QUINOLINIC ANHYDRIDE;Trifluoromathanesulfonyl chloride;Trifluoromethanesulfonamide;Trifluoromethanesulfonic acid