CAS 4591-56-4 appears in our catalog under these names: Diethyl 3,5–Pyridinedicarboxylate, Diethyl 3,5-Pyridinedicarboxylate, >98.0%(GC), Diethyl pyridine-3,5-dicarboxylate 98%, Diethyl pyridine-3,5-dicarboxylate, 98%, 98%, Diethyl pyridine-3,5-dicarboxylate, 97%. Offered by: GLPBio, TCI, Ambeed, Chemat, Fluorochem. Available pack sizes: 100g, 25g, 5g, 1g, 500g.