title: Unprecedented furan-2-carbonyl C-glycosides and phenolic diglycosides from Scleropyrum pentandrum.
abstract: Five unprecedented furan-2-carbonyl C-glycosides, scleropentasides A-E, and two phenolic diglycosides, 4-hydroxy-3-methoxybenzyl 4-O-β-D-xylopyranosyl-(1→6)-β-D-glucopyranoside and 2,6-dimethoxy-p-hydroquinone 1-O-β-D-xylopyranosyl-(1→6)-β-d-glucopyranoside, were isolated from leaves and twigs of Scleropyrum pentandrum together with potalioside B, luteolin 6-C-β-D-glucopyranoside (isoorientin), apigenin 8-C-β-D-glucopyranoside (vitexin), apigenin 6,8-di-C-β-D-glucopyranoside (vicenin-2), apigenin 6-C-α-L-arabinopyranosyl-8-C-β-D-glucopyranoside (isoschaftoside), apigenin 6-C-β-D-glucopyranosyl-8-C-β-D-xylopyranoside, adenosine and l-tryptophan. Structure elucidations of these compounds were based on analyses of chemical and spectroscopic data, including 1D and 2D NMR. In addition, the isolated compounds were evaluated for their radical scavenging activities using both DPPH and ORAC assays.
authors.affiliation: Chulabhorn Research Institute and Chulabhorn Graduate Institute, Kamphaeng Phet 6, Talat Bang Khen, Lak Si, Bangkok 10210, Thailand.
authors.forename: Wannaporn
authors.initials: W
authors.lastname: Disadee
authors.forename: Chulabhorn
authors.initials: C
authors.lastname: Mahidol
authors.forename: Poolsak
authors.initials: P
authors.lastname: Sahakitpichan
authors.forename: Somkit
authors.initials: S
authors.lastname: Sitthimonchai
authors.forename: Somsak
authors.initials: S
authors.lastname: Ruchirawat
authors.forename: Tripetch
authors.initials: T
authors.lastname: Kanchanapoom
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D001713:Biphenyl Compounds / Q000378:metabolism; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015394:Molecular Structure; D010851:Picrates / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018515:Plant Leaves; D018547:Plant Stems; D029630:Santalaceae / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D006027:Glycosides; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl