title: Structural studies of a heteropolysaccharide (PS-I) isolated from hot water extract of fruits of Psidium guajava (Guava).
abstract: A water-soluble polysaccharide was isolated from hot aqueous extracts of fruits of Psidium guajava. The polysaccharide was found to contain 2-O-methyl-l-arabinose, 2-O-acetyl-D-galactose, and D-methyl galacturonate in a molar ratio of approximately 1:1:1. On the basis of acid hydrolysis, methylation analysis, periodate oxidation, and NMR studies ((1)H, (13)C, TOCSY, DQF-COSY, NOESY, ROESY, HMQC, and HMBC), the structure of the repeating unit of the polysaccharide was established as [carbohydrate structure: see text].
authors.affiliation: Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India.
authors.forename: Soumitra
authors.initials: S
authors.lastname: Mandal
authors.forename: Ramsankar
authors.initials: R
authors.lastname: Sarkar
authors.forename: Pradip
authors.initials: P
authors.lastname: Patra
authors.forename: Chanchal K
authors.initials: CK
authors.lastname: Nandan
authors.forename: Debsankar
authors.initials: D
authors.lastname: Das
authors.forename: Sunil K
authors.initials: SK
authors.lastname: Bhanja
authors.forename: Syed S
authors.initials: SS
authors.lastname: Islam
mesh_terms: D002240:Carbohydrate Sequence; D005638:Fruit / Q000737:chemistry*; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification*; D031647:Psidium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D011134:Polysaccharides; D014867:Water