通过核磁共振光谱分析对绿色冬瓜（冬瓜属）果实膳食纤维的结构表征
Structural characterization of dietary fiber of green chalcumra (Benincasa hispida) fruit by NMR spectroscopic analysis.
作者信息
Das Debsankar, Mondal Subhas, Maiti Debabrata, Roy Sadhan K, Islam Syed S
机构信息
Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India.
出版信息
Nat Prod Commun. 2009 Apr;4(4):547-52.
A water-soluble dietary fiber was isolated from the hot aqueous extract of Chalcumra (Benincasa hispida) fruit. The polysaccharide was found to contain D-galactose and D-methyl galacturonate in a molar ratio of 2:1. On the basis of acid hydrolysis, methylation analysis, periodate oxidation, and NMR spectroscopic studies (1H, 13C, TOCSY, DQF-COSY, NOESY, ROESY, HMQC, and HMBC), the repeating unit of the polysaccharide was established as -->4)-beta-D-Galp-(1-->4)-beta-D-Galp-(1-->2)-alpha-D-GalpA6Me-( 1-->.
从冬瓜（Benincasa hispida）果实的热水提取物中分离出一种水溶性膳食纤维。发现该多糖含有摩尔比为2:1的D-半乳糖和D-甲基半乳糖醛酸。基于酸水解、甲基化分析、高碘酸盐氧化和核磁共振光谱研究（1H、13C、TOCSY、DQF-COSY、NOESY、ROESY、HMQC和HMBC），确定该多糖的重复单元为-->4)-β-D-吡喃半乳糖-(1-->4)-β-D-吡喃半乳糖-(1-->2)-α-D-吡喃半乳糖醛酸6-甲酯-(1-->。
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