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Three new flavonoid glycosides from the aerial parts of Graptophyllum grandulosum Turril ( Acanthaceae )

Abstract : Grandulosides A-C, three new flavonoid glycosides, were isolated from the aerial parts of Graptophyllum grandulosum Turill and identified as chrysoeriol-7-O-β-d-apiofuranosyl-(1 → 2)-β-d-xylopyranoside (1), chrysoeriol-7-O-[4′′′-O-acetyl-β-d-apiofuranosyl-(1 → 2)]-β-d-xylopyranoside (2) and 7-O-α-l-rhamnopyranosyl-(1 → 6)-β-d-(4′′-Sodium hydrogeno sulfate) glucopyranoside (3). Four known compounds, chrysoeriol-7-O-β-d-xyloside (4), isorhamnetin-3-O-α-l-rhamnopyranosyl-(1 → 6)-β-d-glucopyranoside (5), luteolin-7-O-β-d-apiofuranosyl-(1 → 2)-β-d-xylopyranoside (6) and sucrose (7) were also obtained. The structures of these compounds were established by interpretation of their spectral data, mainly HR-TOFESIMS, 1D-NMR (1H, 13C) and 2D-NMR (COSY, NOESY, HSQC and HMBC) and by comparison with the literature data.
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https://hal.univ-reims.fr/hal-01996298
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Cyrille Ngoufack Tagousop, David Ngnokam, Dominique Harakat, Laurence Voutquenne-Nazabadioko. Three new flavonoid glycosides from the aerial parts of Graptophyllum grandulosum Turril ( Acanthaceae ). Phytochemistry Letters, Elsevier, 2017, 19, pp.172-175. ⟨10.1016/j.phytol.2016.12.035⟩. ⟨hal-01996298⟩

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