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KMID : 0620720180240030213
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Natural Product Sciences
2018 Volume.24 No. 3 p.213 ~ p.218
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A New Flavonol Glycoside from Tristemma hirtum (Melastomataceae)
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Kenfack Joseph Nandjou
Ponou Beaudelaire Kemvoufo
Kuhlborn Jonas
Teponno Remy Bertrand
Nono Raymond Ngansop
Fouedjou Romuald Tematio
Opatz Till
Park Hee-Juhn
Tapondjou Leon Azefack
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Abstract
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Chemical investigation of the plant Tristemma hirtum P. Beauv (Melastomataceae) resulted to the isolation of a new flavonol glycoside named quercetin-7-O-α-D-arabinofuranoside (1), together with nine known compounds including 3'-hexadecanoyl-2'-(9aZ)-tetradecanoyl-glycerol 1'-O-[β-D-galactopyranosyl-(1'' → 6'')-α- D-galactopyranoside] (2), arjunolic acid (3), β-sitosterol-3-O-β-D-glucopyranoside (4), terminolic acid (5), quercetin (6), asiatic acid (7), maslinic acid (8), 1β-O-galloylpedunculagin (9) and 6-hydroxyapigenin 7-O-β-Dglucopyranoside (10) from the methanol extract using normal and reversed phase column chromatography. The structures of these compounds were determined by comprehensive interpretation of their spectral data mainly including 1D- 2D-NMR (1H-1H COSY, HSQC, and HMBC) spectroscopic and ESI-TOF-MS mass spectrometric analysis.
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KEYWORD
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Tristemma hirtum, Melastomataceae, flavonol glycoside
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