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Planta Med 1980; 40: 76-80
DOI: 10.1055/s-2008-1075007
Research Articles

© Georg Thieme Verlag Stuttgart · New York

Structural Study of a New Complex Polysaccharide from Cassia siamea

N. Khare, P. Dubey, P. C. Gupta
  • Department of Chemistry, University of Allahabad, Allahabad, India
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Publication Date:
29 April 2008 (online)

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Abstract

A water soluble polysaccharide composed of D-galactose, D-mannose and D-xylose in a molar ratio 3:6:2 was isolated from the seeds of C. siamea. Hydrolysis of the methylated polysaccharide furnished five methylated sugars: (I) 2, 3 di-O-methyl D-xylose (II) 2, 3 di-0-methyl D-mannose (111)2, 3, 4-tri-0-methyl D-galactose (IV) 2, 3, 6-tri-0-methyl D-mannose (V) 2, 3, 4, 6-tetra-0-methyl D-galactose in the molar ratio 4:4:2:8:4, while partial acidic hydrolysis yielded five oligosaccharides: (I) Epimelibiose (II) Mannobiose (III) Mannotriose (IV) Mannosylgalactobiose (V) Xylotetraose. A most tenable structure for the polysaccharide has been suggested.

Key Word Index

Cassia siamea - Polysaccharide - Oligosaccharides.