Summary
The degraded gum forms the basic nucleus of the whole gum; during autohydrolysis the labile sugar residues which are attached glycosidically to the main structure are removed and the degraded gum is obtained. The degraded gum is reducing in nature and consists of a repeating unit of ten D-galactose residues and four D-glucuronic acid residues. Methylation and subsequent hydrolysis of the resulting methyl ester of the methylated degraded polysaccharide furnished 2, 3, 4-tri-(6 mol. props.); 2, 4, 6-tri-(1 mol. prop.) and 2, 4-di-O-methyl-D-galactose (3 mol. props.) and 2, 3, 4-tri-O-methyl-D-glucuronic acid (4 mol. props.). On the basis of the identification of the methylated derivatives and their respective molecular proportions a tentative structure has been suggested for the degraded gum.
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References
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Communicated by S. N. Gundu Rao,f.a.sc.
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Mukherjee, S., Shrivastava, A.N. The structure ofAcacia sundra gum. Proc. Indian Acad. Sci. 50, 374–379 (1959). https://doi.org/10.1007/BF03048931
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DOI: https://doi.org/10.1007/BF03048931