Mai Trí | Ho Chi Minh city University of Economics (original) (raw)
Address: Dung, Thanh Hoa, Vietnam
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Papers by Mai Trí
Journal of Natural Products, 1999
Six new triterpenoid saponins, maelaxins A-F (1-6), were isolated from a n-BuOH extract of the le... more Six new triterpenoid saponins, maelaxins A-F (1-6), were isolated from a n-BuOH extract of the leaves of Maesa laxiflora. They possess 22-O-angeloyl-camelliagenin A, 16-O-acetyl, 22-O-angeloyl-camelliagenin A, or 22-O-(2Z)-hexenoyl-camelliagenin A as the aglycon. The pentasaccharide moiety linked to C-3 of the aglycon consists of D-glucuronic acid, L-rhamnose, D-glucose, and/or D-galactose. Their structures were elucidated by extensive NMR experiments including 1 H-1 H (COSY, 2D HOHAHA, NOESY) and 1 H-13 C (HMQC and HMBC) spectroscopy and chemical evidence.
Phytochemistry, 1999
From Ficus ®stulosa two triterpenoids 3b-acetyl ursa-14:15-en-16-one and lanosterol-11-one acetat... more From Ficus ®stulosa two triterpenoids 3b-acetyl ursa-14:15-en-16-one and lanosterol-11-one acetate were isolated along with ®ve known triterpenoids, 3b-acetyl-22,23,24,25,26,27-hexanordamaran-20-one, 24-methylenecycloartenol, sorghumol (isoarborinol), 11a,12a-oxidotaraxeryl acetate, and ursa-9(11):12-dien-3b-ol acetate. Their structures were elucidated on the basis of spectral data interpretation. #
Journal of Natural Products, 1999
Six new triterpenoid saponins, maelaxins A-F (1-6), were isolated from a n-BuOH extract of the le... more Six new triterpenoid saponins, maelaxins A-F (1-6), were isolated from a n-BuOH extract of the leaves of Maesa laxiflora. They possess 22-O-angeloyl-camelliagenin A, 16-O-acetyl, 22-O-angeloyl-camelliagenin A, or 22-O-(2Z)-hexenoyl-camelliagenin A as the aglycon. The pentasaccharide moiety linked to C-3 of the aglycon consists of D-glucuronic acid, L-rhamnose, D-glucose, and/or D-galactose. Their structures were elucidated by extensive NMR experiments including 1 H-1 H (COSY, 2D HOHAHA, NOESY) and 1 H-13 C (HMQC and HMBC) spectroscopy and chemical evidence.
Phytochemistry, 1999
From Ficus ®stulosa two triterpenoids 3b-acetyl ursa-14:15-en-16-one and lanosterol-11-one acetat... more From Ficus ®stulosa two triterpenoids 3b-acetyl ursa-14:15-en-16-one and lanosterol-11-one acetate were isolated along with ®ve known triterpenoids, 3b-acetyl-22,23,24,25,26,27-hexanordamaran-20-one, 24-methylenecycloartenol, sorghumol (isoarborinol), 11a,12a-oxidotaraxeryl acetate, and ursa-9(11):12-dien-3b-ol acetate. Their structures were elucidated on the basis of spectral data interpretation. #