CAS 55750-49-7 appears in our catalog under these names: Ethyl 2,5–dioxo–2,5–dihydro–1H–pyrrole–1–carboxylate, Ethyl 2,5-dioxopyrrole-1-carboxylate, Ethyl 2,5-dioxopyrrole-1-carboxylate 97%, Ethyl 2，5-dioxo-2，5-dihydro-1H-pyrrole-1-carboxylate, 97%, 97%, Ethyl 2,5-dioxopyrrole-1-carboxylate, min. 95 %, 1 g. Offered by: GLPBio, Biosynth, Ambeed, Chemat, Roth. Available pack sizes: 1g, 25g, 5g, 10g, 250mg.