title: Structural elucidations and spectral assigments of two novel triterpene glycosides from Cephalaria paphlagonica.
abstract: Two novel triterpene glycosides, paphlagonoside A (1) and B (2), were characterised as 28-O-[beta-D-glucopyranosyl(1 --> 2)-alpha-L-arabinopyranosyl(1 --> 4)-beta-D-glucopyranosyl]-hederagenin (1) and 28-O-[beta-D-xylopyranosyl(1 --> 4)-alpha-L-rhamnopyranosyl(1 --> 3)-beta-D-xylopyranosyl (1 --> 6)-beta-D-glucopyranosyl(1 --> 2)-beta-D-glucopyranosyl]-hederagenin (2) from Cephalaria paphlagonica (Dipsacaceae). In addition to these, a common natural product (hederagenin) (3) was also isolated. The structures of all compounds were identified by spectroscopic and chemical methods. The antimicrobial and antioxidant activities of the plant extracts were examined by MIC and DPPH activity methods, respectively.
authors.affiliation: Chemistry Department, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Capanlar
authors.forename: S
authors.initials: S
authors.lastname: Kirmizigul
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000378:metabolism; D049917:Dipsacaceae / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010851:Picrates / Q000378:metabolism; D035261:Plant Components, Aerial / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014421:Turkey
chemical_list: D000900:Anti-Bacterial Agents; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D006027:Glycosides; D010851:Picrates; D014315:Triterpenes; C004931:1,1-diphenyl-2-picrylhydrazyl