CAS 63104-44-9 appears in our catalog under these names: Dimethyl Dipropargylmalonate, Dimethyl Dipropargylmalonate, >98.0%(GC), Dimethyl 2,2-di(prop-2-yn-1-yl)malonate 97%, Propanedioic acid, 2,2-di-2-propyn-1-yl-, 1,3-dimethyl ester, 97%, 97%, 2,2-DI-(PROP-2-YNYL)-MALONIC ACID DIMETHYL ESTER, 97%. Offered by: GLPBio, TCI, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 5g, 250mg, 10g, 25g.