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Structural studies of a methyl galacturonosyl-methoxyxylan isolated from the stem of Lagenaria siceraria (Lau) |
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| Authors: | Ghosh Kaushik Chandra Krishnendu Roy Sadhan K Mondal Subhas Maiti Debabrata Das Debsankar Ojha Arnab K Islam Syed S |
| Institution: | Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, West Bengal, India. |
| Abstract: | A water-soluble polysaccharide was isolated from the aqueous extract of the stem of Lagenaria siceraria. The polysaccharide was found to be constituted of methyl d-galacturonate, 2-O-methyl-D-xylose, and d-xylose in a ratio of 1:1:1. On the basis of total acid hydrolysis, methylation analysis, periodate oxidation, NMR studies ((1)H, (13)C, 2D-COSY, TOCSY, NOESY, HSQC, and HMBC), and MALDI-TOF MS analysis, the structure of the repeating unit of the polysaccharide is determined as. |
| Keywords: | Lagenaria siceraria Polysaccharide Structure NMR spectroscopy MALDI-TOF MS analysis |
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