CAS 19872-91-4 appears in our catalog under these names: Dimethyl 4-hydroxypyridine-2,6-dicarboxylate 97%, Dimethyl 4-hydroxypyridine-2,6-dicarboxylate, 95%, dimethyl 4-oxo-1,4-dihydropyridine-2,6-dicarboxylate, Dimethyl 4-Hydroxypyridine-2,6-dicarboxylate, 97%, 97%. Offered by: Ambeed, Fluorochem, Biosynth, Chemat. Available pack sizes: 100g, 250mg, 1g, 5g, 25g, 10g, 50g.