tubotaiwine/dvazgis

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Plant anticancer agents IV: identification of tubotaiwine-N-oxide as a cytotoxic constituent of Tabernaemontana holstii.

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Isolation of opioid-active compounds from Tabernaemontana pachysiphon leaves.

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A procedure for prefractionation of crude plant extracts by centrifugal partition chromatography (CPC) has been developed to enable rapid identification of known-positive compounds or false-positive compounds and to increase the chance of identifying minor unknown-active compounds. The study

Leaf alkaloid contents of Tabernaemontana pachysiphon as influenced by endogenous and environmental factors in the natural habitat.

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Indole alkaloid contents were investigated in leaves of Tabernaemontana pachysiphon (Apocynaceae) trees in the natural habitat, Shimba Hills National Reserve, Kenya. The contents of the major alkaloids apparicine, tubotaiwine, tubotaiwine- N-oxide, and isovoacangine varied with site, leaf age, leaf

Accumulation of indole alkaloids in a suspension culture of Tabernaemontana divaricata.

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Cell suspension cultures of TABERNAEMONTANA DIVARICATA were found to produce relatively large amounts of indole alkaloids. For their isolation an ion-pair DCCC method was used in combination with preparative TLC. The alkaloids were identified as tabernaemontanine, perivine, vobasine, voaphylline,

Growth and alkaloid contents in leaves of Tabernaemontana pachysiphon Stapf (Apocynaceae) as influenced by light intensity, water and nutrient supply.

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The growth of Tabernaemontana pachysiphon (Apocynaceae) plants and the alkaloid content of leaves were investigated in the greenhouse at three levels of nutrient supply under two contrasting water and light regimes. We determined height increment, above-ground biomass production, leaf size, specific

Indole alkaloids from cell suspension cultures of Tabernaemontana divaricata and Tabernanthe iboga.

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From cell suspension cultures of Tabernaemontana divaricata and Tabernanthe iboga grown under standard conditions, six monoterpenoid indole alkaloids have been isolated and identified. T. divaricata synthesized apparicine, catharanthine, coronaridine, conoflorine, tubotaiwine and vinervine, whereas

Characterization of a Suspension Culture of Tabernaemontana elegans on Growth, Nutrient Uptake, and Accumulation of Indole Alkaloids*.

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A suspension culture of TABERNAEMONTANA ELEGANS was characterized on growth, nutrient uptake (carbohydrate, nitrogen, and phosphate), and on accumulation of indole alkaloids. Besides tryptamine seven indole alkaloids were isolated and identified: vobasine, vobasinol, perivine, isositsirikine,

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