(S)-22-(tert-butoxycarbonyl)-43,43-dimethyl-10,19,24,41-tetraoxo-3,6,12,15,42-pentaoxa-9,18,23-triazatetratetracontanoic acid

SINOPEG is a fast-growing biotech company dedicated to drug delivery system(DDS) .Apart from being a leading provider of polyethylene glycol derivatives(PEGs), we also specialize in researching, developing and manufacturing of long-acting biopharmaceutical, block copolymers and lipids applied in drug delivery, medical devices, and bio-engineering. With proprietary technologies and adherence to high GMP standards, SINOPEG is able to provide wide range of PEG derivatives as well as customized synthesis service under strict quality control.Our products range from laboratory scale to large commercial quantities and are served to bio-technology and pharmaceutical companies as well as research organizations worldwide.