CAS 430430-57-2 appears in our catalog under these names: 2,2-Dimethyl-4-oxo-3,8,11-trioxa-5-azatridecan-13-yl methanesulfonate 95%, 2,2-Dimethyl-4-oxo-3,8,11-trioxa-5-azatridecan-13-yl methanesulfonate, 97%, 97%, Boc-PEG3-mesylate, 95.0%, 2,2-Dimethyl-4-oxo-3,8,11-trioxa-5-azatridecan-13-yl methanesulfonate, 97%. Offered by: Ambeed, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 250mg, 1g, 5g, 100mg, 500 mg, 250 mg, 100 mg, 1 g.