melodinus monogynus/alkaloid

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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

Aspidosperma-type Alkaloids from Melodinus suaveolens.

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Three new aspidosperma-type alkaloids, 3-oxo-11-hydroxytabersonine (2), 1 1-hydroxytabersonine N-oxide (3) and 11-methoxytabersonine N-oxide (4), along with three known ones were isolated from the twigs and leaves of Melodinus suaveolens. The structures of the new compounds were elucidated by using

Alkaloids from Melodinus henryi with anti-inflammatory activity.

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One new quinolinic scandine-type monoterpeniod alkaloid, 3-oxo-scandine (1), as well as seven known ones (2-8), was isolated from the roots of Melodinus henryi. Their structures were elucidated by extensive spectroscopic analysis. All of the compounds were prepared and evaluated for their

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 alkaloids from Melodinus suaveolens.

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Two new Melodinus-type alkaloids, 15β-hydroxy-14,15-dihydroscandine (1) and 14,15-dihydroscandine (2), together with 6 known ones were isolated from Melodinus suaveolens. The structures of the new compounds were identified from spectroscopic (NMR, UV, IR, CD) and mass spectrometric data and Mosher's

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

Six new alkaloids from Melodinus henryi.

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A total of six new alkaloids, melodinhenines A-F (1-6), were isolated from Melodinus henryi. Melodinhenines A and B are new eburnan-vindolinine-type bisindole alkaloids and melodinhenines C-F are new quinolinic melodinus alkaloids. Their structures were elucidated through extensive spectroscopic

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

Melohenines A and B, two unprecedented alkaloids from Melodinus henryi.

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A phytochemical study on Melodinus henryi has led to the isolation of two novel alkaloids, melohenines A (1), a monoterpenoid indole alkaloid with additional skeletal carbons arranged compactly in eight rings, and melohenine B (2), an alkaloid with an unprecedented 6/9/6/6 tetracyclic ring system

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

Melocochines A and B, Two Alkaloids from the Fruits of Melodinus cochinchinensis.

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Melocochines A (1) and B (2), one pair of epimers with an unprecedented skeleton, were isolated from Melodinus cochinchinensis. Their structures and absolute configurations were established by a combination of MS, NMR, and single-crystal X-ray diffraction analyses. Compounds

The Alkaloids of Melodinus acutiflorus. Rhyzicine N-Oxide.

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From the leaves of MELODINUS ACUTIFLORUS a new alkaloid, rhazicine N-oxide ( 2), and two known compounds, deacetylakuammiline ( 3) and 16- EPI-rhazinaline ( 4) were isolated. The structure of 2 was determined by spectral analysis and chemical correlation with rhazicine ( 1).

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