CAS 51940-44-4 appears in our catalog under these names: Pipemidic acid, Pipemidic acid/ 99.9%, Pipemidic acid, 98% , Pipemidic acid 98%, Pyrido[2,3-d]pyrimidine-6-carboxylicacid, 8-ethyl-5,8-dihydro-5-oxo-2-(1-piperazinyl)-, 98%, 98%. Offered by: Dr. Ehrenstorfer, TargetMol, Thermo Scientific (Alfa Aesar), Biosynth, Ambeed. Available pack sizes: 250mg, 50mg, 100mg, 200mg, 500mg, 10g, 100g, 5g.