title: Two new flavanone glycosides of Jasminum lanceolarium and their anti-oxidant activities.
abstract: Two new flavanone glucosides, (2S)-5,7,3',5'-tetrahydroxy-flavanone 7-O-beta-D-allopyranoside (1) and (2S)-5,7,3',5'-tetrahydroxy-flavanone 7-O-beta-D-glucopyranosie (2) were isolated from the stems and leaves of Jasminum lanceolarium, along with five known compounds: Betulinaldehyde (3), betulinic acid (4), betulin (5), syringin (6) and Liriodendrin (7). Their structures were determined on the basis of spectroscopic and chemical methods. The isolated compounds were screened for their in vitro antioxidant activity through DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging assay. Compounds 2 demonstrated significant radical scavenging activity.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.China.
authors.forename: Jia-Ming
authors.initials: JM
authors.lastname: Sun
authors.forename: Jun-Shan
authors.initials: JS
authors.lastname: Yang
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D044950:Flavanones / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D031660:Jasminum / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: C520698:(2S)-5,7,3',5'-tetrahydroxy-flavanone 7-O-beta-D-allopyranoside; C520699:(2S)-5,7,3',5'-tetrahydroxy-flavanone 7-O-beta-D-glucopyranoside; D000975:Antioxidants; D044950:Flavanones; D006027:Glycosides