Stereochemistry of a triterpenoid trisaccharide from Centella asiatica. X-Ray determination of the structure of asiaticoside

Autor:	Peter Luger, Shashi B. Mahato, Niranjan P. Sahu, Eveline Müller
Rok vydání:	1987
Předmět:	chemistry.chemical_classification Centella Molecular geometry Lattice constant biology Triterpene Chemistry Stereochemistry Glycoside Trisaccharide biology.organism_classification Monoclinic crystal system Diffractometer
Zdroj:	J. Chem. Soc., Perkin Trans. 2. :1509-1515
ISSN:	1364-5471 0300-9580
DOI:	10.1039/p29870001509
Popis:	The molecular geometry of asiaticoside (1), a trisaccharide triterpene isolated from Centella asiatica, has been determined by a single-crystal X-ray analysis. The glycoside, C48H78O19, is prismatic with space group monoclinic, C2 and lattice constants a= 41.46 (1), b= 7.563 (4), c= 17.988 (5)A, β= 99.66(5)°, cell volume V= 5 602.3 A3, and Z= 4. Diffractometer intensity measurements were made with Cu-Kα radiation and least-squares adjustment of the atomic parameters converged to a final R value of 0.073. 13C N.m.r. and f.a.b.-m.s. are satisfactorily interpreted within terms of the structure.
Databáze:	OpenAIRE
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