Article

Six new triterpenoid saponins from the root and stem bark of Cephalanthus occidentalis.

Center for Medicinal Plant Research, Arthur Temple College of Forestry, Stephen F. Austin State University, Nacogdoches, Texas 75962-6109, USA.
Planta Medica (impact factor: 2.15). 05/2005; 71(4):355-61. DOI:10.1055/s-2005-864103 pp.355-61
Source: PubMed

ABSTRACT From the root and stem bark of Cephalanthus occidentalis L., a common American wetland species, six new triterpenoid saponins (1 - 6), together with 29 known compounds were isolated and identified. On the basis of spectroscopic analysis and chemical degradation, the structures of new compounds were elucidated as 3-O-beta-glucopyranosylcincholic acid (1), cincholic acid 28-O-beta-glucopyranosyl ester (2), 3-O-beta-glucopyranosyl-(1-->4)-beta-fucopyranosylcincholic acid (3), 3-O-beta-glucopyranosyl-(1-->4)-beta-fucopyranosylcincholic acid 28-O-beta-glucopyranosyl ester (4), 3-O-beta-glucopyranosylcincholic acid 28-O-alpha-arabinopyranosyl-(1-->2)-beta-glucopyranosyl ester (5), and 3-O-beta-glucopyranosylquinovic acid 28-O-alpha-arabinopyranosyl-(1-->2)-beta-glucopyranosyl ester (6).

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Keywords

3-O-beta-glucopyranosylcincholic acid
 
chemical degradation
 
cincholic acid 28-O-beta-glucopyranosyl ester
 
common American wetland species
 
new compounds
 
new triterpenoid saponins
 
spectroscopic analysis