Further flavonol and iridoid glycosides from Ajuga remota aerial parts |
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| Authors: | LAWRENCE ONYANGO AROT Manguro JOSEPH ACHOLA Ogur DENNIS MAGIO Okora SAMUEL OTIENO Wagai PETER Lemmen |
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| Affiliation: |
a Chemistry Department, Maseno University, Maseno, Kenya
b Botany Department, Maseno University, Maseno, Kenya
c Technische Universitaet Muenchen, Institut fuer Organische Chemie und Biochemie, Garching, Germany |
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| Abstract: | Five new iridoid glycosides characterised as 6-keto-8-acetylharpagide (1), 6,7-dehydro-8-acetylharpagide (2), 7,8-dehydroharpagide (3), 8-acetylharpagide-6-O-β-glucoside (4), harpagide-6-O-β-glucoside (5) together with three flavonol glycosides, myricetin 3-O-rutinoside-4'-O-rutinoside (6), myricetin 3-O-rutinoside-3'-O-rutinoside (7) and isorhamnetin 3-O-rutinoside-7-O-rutinoside-4'-O-β-glucoside (8) have been isolated from the aerial parts of Ajuga remota. Also isolated were two known compounds ajugarin IV and ajugarin V. Their structures were established using spectroscopic methods including UV, IR, FAB-MS, HR-MS, 1D and 2D NMR techniques. |
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| Keywords: | Ajuga remota Labiatae Iridoid glycosides Flavonol glycosides |
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