31655-52-4Relevant academic research and scientific papers
Structural elucidation, antioxidant and immunomodulatory activities of a novel heteropolysaccharide from cultured Paecilomyces cicadae (Miquel.) Samson
Wang, Yanbin,He, Pengfei,He, Liang,Huang, Qingrong,Cheng, Junwen,Li, Weiqi,Liu, Yu,Wei, Chaoyang
, p. 270 - 281 (2019)
The fine structure and chain conformation of a heteropolysaccharide (PCIPS3) from mycelium of Paecilomyces cicadae were investigated via the analysis of HPLC, IR, methylation, NMR spectroscopy and multiangle light scattering. It was determined to be a 2.23 × 104 g/mol heteropolysaccharide primarily composed of glucose, galactose and mannose in a molar ratio of 23.8:2.1:1.0. The PCIPS3 backbone consisted of 1,4-linked α-D-Glcp and 1,4-linked 6-O-Me-α-D-Glcp residues, which were occasionally interrupted by branched β-Galf residues through 1,6-linkage. Moreover, the α (0.60) from Mark–Houwink–Sakurada (MHS) equation suggested that PCIPS3 adopted a flexible chain conformation in 0.1 mol/L NaNO3 at 25 °C. The worm-like chains model parameters for PCIPS3 were estimated as following: ML = 437 nm?1, q = 0.46 nm and 0.79 nm, which were further evidenced by AFM. Furthermore, PCIPS3 showed excellent scavenging capacities of 2,2-diphenyl-1-picrylhydrazyl radical, superoxide radical, hydroxyl radical, ORAC radical and moderate immunomodulatory activity.
SYNTHESIS OF p-NITROPHENYL 3-O-β-D-GALACTOPYRANOSYL-β-D-GALACTOPYRANOSIDE AND p-NITROPHENYL 3-O-α-D-GALACTOPYRANOSYL-β-D-GALACTOPYRANOSIDE
Abbas, Saled A.,Barlow, Joseph J.,Matta, Khushi L.
, p. 231 - 244 (2007/10/02)
Glycosylation (catalyzed by mercuric cyanide) of p-nitrophenyl 2,4,6,-tri-O-acetyl-β-D-galactopyranoside (2) with 2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl bromide in acetonitrile afforded the α-(1->3)- and β-(1->3)-linked disaccharide heptaacetates (4
