title: Two new acetylated flavonoid glycosides from Phyllanthus urinaria.
abstract: Two new acetylated flavonoid glycosides, quercetin 3-O-α-l-(2,4-di-O-acetyl) rhamnopyranoside-7-O-α-l-rhamnopyranoside (1) and quercetin 3-O-α-l-(3,4-di-O-acetyl) rhamnopyranoside-7-O-α-l-rhamnopyranoside (2), together with two known compounds, quercetin (3) and quercetin 3-O-α-l-rhamnopyranoside (4), were isolated from the ethanol extract of Phyllanthus urinaria. The structures of the new compounds were determined on the basis of extensive spectroscopic data including IR, HR-ESI-MS, 1D NMR, and 2D NMR.
authors.affiliation: Institute of Traditional Chinese Medicine and Natural Products, Jinan University, Guangzhou 510632, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wu
authors.forename: Chun-Shan
authors.initials: CS
authors.lastname: Wei
authors.forename: Shao-Fu
authors.initials: SF
authors.lastname: Yu
authors.forename: Bai-Lian
authors.initials: BL
authors.lastname: Liu
authors.forename: Yao-Lan
authors.initials: YL
authors.lastname: Li
authors.forename: Wen-Cai
authors.initials: WC
authors.lastname: Ye
authors.forename: Guang-Dong
authors.initials: GD
authors.lastname: Tong
authors.forename: Guang-Xiong
authors.initials: GX
authors.lastname: Zhou
mesh_terms: D000107:Acetylation; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D029803:Phyllanthus / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D006027:Glycosides; C583680:quercetin 3-O-alpha-L-(3,4-di-O-acetyl)rhamnopyranoside-7-O-alpha-L-rhamnopyranoside; C583679:quercetin 3-O-alpha-l-(2,4-di-O-acetyl)rhamnopyranoside-7-O-alpha-L-rhamnopyranoside; C509385:quercetin-3-O-alpha-L-rhamnopyranoside; D011794:Quercetin