3,5-Pyridinedicarboxylic acid, bis(1-methylethyl) ester 3,5-Pyridinedicarboxylic acid, diisopropyl ester 3737-22-2 5-22-04-00140 (Beilstein Handbook Reference) BRN 0481549 Diisopropyl pyridine-3,5-dicarboxylate ENT 17591