Three new triterpenoid saponins, namely prostratosides A-C (1-3), were isolated from the whole plant of Polycarpon prostratum (Forssk.) Aschers. et Schwein. ex Aschers. By spectroscopic methods, their structures were determined as 3-O-{β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-［β-D-glucopyranosyl-(1→2)］-α-L-arabinopyranoside}-22α-acetoxy-saikogenin G, 3-O-{β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-［β-D-glucopyranosyl-(1→2)］-α-L-arabinopyranoside}-16α-hydroxy-22α-acetoxy-saikogenin E and 3-O-{β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-［β-D-glucopyranosyl-(1→2)］-α-L-arabinopyranoside}-21β-acetoxy-saikogenin G, respectively.
triterpenoid saponin, Caryophyllaceae, Polycarpon prostratum
Journal NLM ID: 101240075WWW link: https://www.jipb.net/EN/Y2000/V42/I3/306Institutions: Department of Chemistry, Yunnan University, Kunming, China, Laboratory of Phytochemistry, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, China
Methods: 13C NMR, 1H NMR, IR, FAB-MS, extraction, optical rotation measurement, CC, melting point determination, HR-FAB-MS
Found