Structural elucidation of a novel mannogalactan isolated from the fruiting bodies of Pleurotus geesteranus

► It was isolated and purified by columns of DEAE-Sepharose F. F. and Sephacryl S H.R. ► It is composed of d-glucose, d-galactose, d-mannose, and 3-O-methylgalactose. ► Its structure is determined by MS, 1H, 13C and 2D NMR spectroscopic as follows: .