Syntheses of subtractively modified 2-chloro-4-nitrophenyl β-maltopentaosides and their application to the differential assay of human alpha-amylases

Abstract Three novel maltopentaosides, 2-chloro-4-nitrophenyl O -(6-deoxy-α- d - xylo -hex-5-enopyranosyl)-(1 → 4)-tris[ O -α- d -glucopyranosy the hydrolytic rate of 10 , we developed a new method for the differential assay of these two human alpha-amylases.