CAS 2828438-36-2 appears in our catalog under these names: 3-((3-(2-(2,6-Dioxopiperidin-3-yl)-1,3-dioxoisoindolin-5-yl)prop-2-yn-1-yl)oxy)propanoic acid, 95%+, 95%+, Thalidomide-Propargyne-PEG1-COOH, 99.62%. Offered by: Chemat, MedChemExpress. Available pack sizes: 10mg, 25mg, 50mg, 100mg, 250mg, 50 mg, 100 mg, 25 mg.