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isositsirikine/dvazgis
Nuoroda įrašoma į mainų sritį
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[12-Methoxy-17,18-dehydro-vincamine and 16-epi-isositsirikine, alkaloids from Tabernaemontana psorocarpa].
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Prisijungti Registracija
Besides sweroside ( 1) two main alkaloids were isolated from twigs and leaves of Tabernaemontana psorocarpa and shown to be 12-methoxy-17,18-dehydrovincamine ( 2) and 16-epi-isositsirikine ( 3) respectively.
Alkaloids from Tabernaemontana psorocarpa.
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The isolation of the alkaloids from two different samples of stem bark of Tabernaemontana psorocarpa is described. Both samples contained 16-epi-isositsirikine as the major alkaloid but differed from each other in the number and quantity of the other alkaloids. The following minor alkaloids were
Four tetracyclic oxindole alkaloids and a taberpsychine derivative from a Malayan Tabernaemontana.
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Four tetracyclic oxindole alkaloids, 7(R)- and 7(S)-geissoschizol oxindole (1 and 2), 7(R),16(R)- and 7(S),16(R)-19(E)-isositsirikine oxindole (3 and 4), in addition to a taberpsychine derivative, N(4)-demethyltaberpsychine (5), were isolated from the Malayan Tabernaemontana corymbosa and the
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,
Two new sarpagine-type indole alkaloids and antimalarial activity of 16-demethoxycarbonylvoacamine from Tabernaemontana macrocarpa Jack.
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Two new sarpagine-type indole alkaloids (1 and 2), together with five known alkaloids; 12-methoxy-4-methylvoachalotine (3), 16-demethoxycarbonylvoacamine (4), isositsirikine (5), affinisine (6), affinine (7), were isolated from the bark of Tabernaemontana macrocarpa Jack. The structures of these
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