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melodinus guillauminii/rak
Povezava se shrani v odložišče
Stran 1 iz 20 rezultatov
Cytotoxic aspidosperma-type alkaloids from Melodinus suaveolens.
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Four new aspidosperma-type alkaloids, melosuavines J-M (1-4) were isolated from the leaves of Melodinus suaveolens. Their structures with absolute configurations were elucidated by extensive HRESIMS and NMR spectroscopic analysis, as well as ECD calculations and Mosher's method. Their cytotoxic
Melosuavine I, an apoptosis-inducing bisindole alkaloid from Melodinus suaveolens.
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A new bisindole alkaloid, melosuavine I (1) possessing an aspidosperma-aspidosperma dimeric skeleton, was isolated from the leaves of Melodinus suaveolens. The structure with absolute configuration of 1 was elucidated by a combination of MS, NMR and computational methods. MTT assays indicated that 1
Melosuavines A-H, cytotoxic bisindole alkaloid derivatives from Melodinus suaveolens.
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Eight new bisindole alkaloids, melosuavines A-C (1-3), having an aspidosperma-scandine linkage, melosuavines D-F (4-6), possessing an aspidosperma-aspidosperma skeleton, and melosuavines G and H (7 and 8) of the aspidosperma-venalatonine type, tenuicausine (9), and melodinine J (10) were isolated
Two new compounds from Melodinus suaveolens.
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Two new compounds, 19-hydroxy-melodinine K (1) and melodiside (2), and 25 known compounds were isolated from leaves and twigs of Melodinus suaveolens. Their structures were elucidated based on 1- and 2-D NMR, FTIR, UV and MS spectroscopic data. 19-hydroxy-melodinine K showed cytotoxic activity
Melodinines M-U, cytotoxic alkaloids from Melodinus suaveolens.
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Nine new alkaloids, melodinines M-U (1-9), and 11 known alkaloids were isolated from Melodinus suaveolens. The new structures were elucidated by extensive NMR and mass spectroscopic analyses and comparison to known compounds. All compounds were evaluated for their cytotoxicity against five human
Cytotoxic indole alkaloids from the fruits of Melodinus cochinchinensis.
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Eight indole alkaloids, melosines A-H, together with 13 known alkaloids, were isolated from the fruits of Melodinus cochinchinensis. The structure elucidation of isolated secondary metabolites was based on comprehensive spectroscopic data analysis. Melosine B showed moderate cytotoxic activity
Monoterpenoid indole alkaloids from the bark of Melodinus henryi.
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Four new alkaloids, melodinines W1-W4 (1-4), together with twenty one known alkaloids (5-25) were isolated from Melodinus henryi. The structures with absolute configurations were elucidated by extensive MS and NMR spectroscopic methods, as well as the single crystal X-ray
Melodinines A-G, monoterpenoid indole alkaloids from Melodinus henryi.
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Nineteen monoterpenoid indole alkaloids including seven new ones, melodinines A-G (1-7), were isolated from Melodinus henryi. The structures of the new compounds were elucidated using spectroscopic methods, and the structure of compound 4 was confirmed by single-crystal X-ray diffraction analysis.
Cytotoxic indole alkaloids from Melodinus khasianus and Melodinus tenuicaudatus.
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Four new indole alkaloids, melodinusines A-D (1, 2, 6, and 7), along with 26 known indole alkaloids, were isolated from Melodinus tenuicaudatus and Melodinus khasianus (Melodinus genus). Among them, 1 and 2 are aspidospermine-aspidospermine-type bisindole alkaloids while 7 is a novel melodinus-type
Alkaloids from Melodinus yunnanensis.
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Ten monoterpenoid indole alkaloids, namely meloyine, 19S-methoxytubotaiwine N₄-oxide, 16,19-epoxy-Δ¹⁴-vincanol, 14β-hydroxymeloyunine, meloyunine, Δ¹⁴-vincamenine N₄-oxide, 16β,21β-epoxy-vincadine, 14β,15β-20S-quebrachamine, 3-oxo-voaphylline, 2α,7α-dihydroxy-dihydrovoaphylline, and 32 known
Cytotoxic monoterpenoid-type alkaloids from the aerial parts of Melodinus morsei.
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Three new monoterpenoid alkaloids, melomorines A-C (1-3), along with melohemsine B (4), were isolated from the 70% ethanol extract of the aerial parts of Melodinus morsei. Structural elucidation of all the compounds was performed on the basis of spectral data. All the compounds were tested in vitro
Cytotoxic melodinus-type alkaloids from the ethanol extract of Melodinus fusiformis.
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A chemical investigation of the ethanol extract of the aerial parts of Melodinus fusiformis led to the isolation of six new melodinus-type alkaloids, melofusines A-E (1-6), along with one known compound, melodinine B. Structural elucidation of all the compounds was performed by spectral methods such
Melognine, a novel monoterpenoid indole alkaloid from Melodinus fusiformis that induce apoptosis in BT549 cells.
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A novel monoterpenoid indole alkaloid, melognine (1) possessing an unprecedented skeleton with a 6/6/5/5/6/6 hexatomic rearranged ring system was isolated from the stems of Melodinus fusiformis. The structure with absolute configuration of 1 was established by extensive
Melotenuines A-E, cytotoxic monoterpenoid indole alkaloids from Melodinus tenuicaudatus.
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Five new monoterpenoid indole alkaloids, melotenuines A-E (1-5), along with 18 known indole alkaloids, were isolated from the twigs and leaves of Melodinus tenuicaudatus. The structures of the new alkaloids were determined by a combination of MS, NMR and ECD analysis. Melotenuine A (1) represents
Cytotoxic aspidosperma-type alkaloids from Melodinus axillaris.
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One new aspidosperma-type alkaloid, melotenine A (1), together with five known ones (2-6), was isolated from the leaves of Melodinus axillaris. Their structures were elucidated by detailed spectroscopic analysis and quantum chemical ECD calculation. The isolated aspidosperma-type alkaloids were
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