CAS 28783-51-9 appears in our catalog under these names: 2-Chloromethylene-malonic acid diethyl ester, 95%, Diethyl 2-(chloromethylene)malonate, 97%, Diethyl 2-(chloromethylene)malonate, 2-CHLOROMETHYLENE-MALONIC ACID DIETHYL ESTER, 97%, 97%, 2-Chloromethylene-malonic acid diethyl ester, 97%. Offered by: Combi-blocks, AmBeed, Biosynth, Chemat, Fluorochem. Available pack sizes: 250mg, 5g, 1g, 25g, 500mg, 10g.