Flavonoid Glycosides from the Flowers ofPulsatilla koreanaNakai

Abstract

− Extraction and fractionation of Pulsatilla koreana flowers followed by, repeated open column chromatography for EtOAc and n-BuOH fractions yielded four flavonoid glycosides, namely, astragalin (1), tiliroside (2), buddlenoide A (3), and apigenin-7-O-(3''-E-p-coumaroyl)-glucopyranoside (4). The chemical structures of these flavonoid glycosides were elucidated on the basis of various spectroscopic methods including electronic ionization mass spectrometry (EI-MS), 1D NMR ( 1 H, 13C, DEPT), 2D NMR (gCOSY, gHSQC, gHMBC), and infrared (IR) spectrometry. This study represents the first report of the isolation of the flavonoid glycosides from the flowers of P. koreana.

Identification of the active components inhibiting the expression of matrix metallopeptidase-9 by TNFα in ethyl acetate extract of Euphorbia humifusa Willd

“…C-NMR data of F1 with the data published previously [10]. The 1 3 C-NMR data obtained from the current study were collected in dimethylsulfoxide-d6, and those published previously were in dimethylsulfoxide-d6 position 1 3 C-NMR data obtained from the current study collected in dimethylsulfoxide-d6/ ppm C-NMR data of F3 with the data published previously [9]. The 1 3 C-NMR data obtained from the current study were collected in dimethylsulfoxide-d6, and those published previously were in methanol-d4 position 1 3 C-NMR data obtained from the current study collected in dimethylsulfoxide-d6/ ppm A comparison of the 13 C-NMR data of F1 with the data published previously [11] was listed in Table 3.…”

“…5A). A comparison of the 13 C-NMR data of F3 with the data published previously [9] was listed in Table 1.…”

Metabolite Profiling of Rambutan (Nephelium lappaceum L.) Seeds Using UPLC-qTOF-MS/MS and Senomorphic Effects in Aged Human Dermal Fibroblasts

“…The structures of the nine major compounds in the EA and n-BuOH fractions were predicted based on their MS/MS fragment patterns (Figure 2A [19,20], and kaempferol 7-O-α-l-rhamnopyranoside ( 9) [21] by comparing their physicochemical properties and NMR spectra with those previously reported. 2D).…”

Flavonoids from flowers of Amesiodendron chinense (Sapindaceae)

“…Thus, 3 was confirmed as chrysoeriol (3′-methoxy-4′,5,7-trihydroxyflavone). 2) [11]. Thus, the compound 5 was confirmed as kaempferol 3-O-β-D-glucopyranoside or astragalin.…”