SEARCH Articles Figures Tables 2- pyridine, reaction complexes Complexes pyridine Dicarboxylic acids, reaction Pyridination reaction Pyridine 2,5-dicarboxylate Pyridine dicarboxylates Pyridine, reactions Pyridine-3,5-dicarboxylic acid, reaction Pyridines acidity Pyridines complexation Pyridines pyridine-3,5-dicarboxylate