title: 5-O-caffeoylshikimic acid from Solanum somalense leaves: advantage of centrifugal partition chromatography over conventional column chromatography.
abstract: Solanum somalense leaves, used in Djibouti for their medicinal properties, were extracted by MeOH. Because of the high polyphenol and flavonoid contents of the extract, respectively, determined at 80.80 ± 2.13 mg gallic acid equivalent/g dry weight and 24.4 ± 1.01 mg quercetin equivalent/g dry weight, the isolation and purification of the main polyphenols were carried out by silica gel column chromatography and centrifugal partition chromatography. Column chromatography led to 11 enriched fractions requiring further purification, while centrifugal partition chromatography allowed the easy recovery of the main compound of the extract. In a solvent system composed of CHCl3/MeOH/H2O (9.5:10:5), 21.8 mg of this compound at 97% purity was obtained leading to a yield of 2.63%. Its structure was established as 5-O-caffeoylshikimic acid by mass spectrometry and NMR spectroscopy. This work shows that S. somalense leaves contain very high level of 5-O-caffeoylshikimic acid (0.74% dry weight), making it a potential source of production of this secondary metabolite that is not commonly found in nature but could be partly responsible of the medicinal properties of S. somalense leaves.
authors: EDYSAN FRE 3498 CNRS-Université de Picardie Jules Verne, UFR de Pharmacie, Amiens Cedex, France; Centre de Recherche, Université de Djibouti, Avenue Georges Clémenceau, Djibouti.
authors: Saïda
authors: S
authors: Chideh
authors: Serge
authors: S
authors: Pilard
authors: Jacques
authors: J
authors: Attoumbré
authors: Robert
authors: R
authors: Saguez
authors: Alshaimaa
authors: A
authors: Hassan-Abdallah
authors: Dominique
authors: D
authors: Cailleu
authors: Anne
authors: A
authors: Wadouachi
authors: Sylvie
authors: S
authors: Baltora-Rosset
mesh_terms: D002845:Chromatography / Q000295:instrumentation / Q000379:methods*; D013058:Mass Spectrometry; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry; D012765:Shikimic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D032322:Solanum / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D012765:Shikimic Acid; C036792:5-O-caffeoylshikimic acid
keywords: Bioautography; Caffeoylshikimic acids; Dactylifric acid; Polyphenols; Solanum somalense