title: Caffeoyl sugar esters and an ellagitannin from Rubus sanctus.
abstract: The new natural caffeoyl esters, 3,6-di-O-caffeoyl-(alpha/beta)-glucose and 1-O-caffeoyl-beta-xylose, together with the hitherto unknown natural tannin, 2,3-O-hexahydroxydiphenoyl-4,6-O-sanguisorboyl-(alpha/beta)-glucose, have been isolated from the aqueous alcohol aerial part extract of Rubus sanctus. Establishment of all structures was based on the chemical and spectral evidence, including ESI-MS and 2D NMR.
authors.affiliation: National Research Center, Dokki, Cairo, Egypt.
authors.forename: Sahar A M
authors.initials: SA
authors.lastname: Hussein
authors.forename: Nahla A
authors.initials: NA
authors.lastname: Ayoub
authors.forename: Mahmoud A M
authors.initials: MA
authors.lastname: Nawwar
mesh_terms: D002109:Caffeic Acids / Q000737:chemistry*; D002236:Carbohydrate Conformation; D004952:Esters / Q000737:chemistry* / Q000302:isolation & purification; D005947:Glucose / Q000031:analogs & derivatives; D047348:Hydrolyzable Tannins; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry; D027824:Rosaceae / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification; D014994:Xylose / Q000031:analogs & derivatives
chemical_list: D002109:Caffeic Acids; D004952:Esters; D047348:Hydrolyzable Tannins; D013634:Tannins; C013515:ellagitannin; D014994:Xylose; D005947:Glucose