scholarly journals New Iboga-Type Indole Alkaloids from Tabernaemontana divaricata

2019 ◽  
Vol 9 (6) ◽  
pp. 425-429 ◽  
Author(s):  
Xiang-Mei Li ◽  
Xian-Jun Jiang ◽  
Guo-Zhu Wei ◽  
Li-Hua Ren ◽  
Li-Xia Wang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Circular Dichroism Spectrum ◽  
Spectroscopic Data ◽  
Indole Alkaloids ◽  
Data Interpretation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tabernaemontana Divaricata ◽  
Circular Dichroïsm

Abstract Two hitherto unknown iboga-type indole alkaloids, namely (3R)-7,19-di-epi-3-methoxytabernoxidine (1) and (3R,19R)-19-hydroxy-3-(2-oxopropyl)voacangine (2), together with eight known alkaloids (3–10), were isolated from the twigs and leaves of Tabernaemontana divaricata. Their structures were established on the basis of spectroscopic data interpretation, single crystal X-ray diffraction analysis and circular dichroism spectrum. Graphic Abstract

scholarly journals Anti-inflammatory Anthraquinones from the Crinoid Himerometra magnipinna

2015 ◽  
Vol 10 (2) ◽  
pp. 1934578X1501000
Author(s):  
Yen-You Lin ◽  
Su-June Tsai ◽  
Michael Y. Chiang ◽  
Zhi-Hong Wen ◽  
Jui-Hsin Su
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Absolute Configuration ◽  
Spectroscopic Data ◽  
Test Compound ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anti Inflammatory ◽  
Raw264.7 Macrophage

Chemical investigation of a crinoid Himerometra magnipinna has afforded three anthraquinones (1–3), including one new metabolite, (+)-rhodoptilometrin (1). The structures of these compounds were elucidated on the basis of their spectroscopic data and the absolute configuration of 1 was further confirmed by single-crystal X-ray diffraction analysis. In the in vitro anti-inflammatory effects test, compound 2 was found to significantly inhibit the accumulation of the pro-inflammatory iNOS protein of the LPS-stimulated RAW264.7 macrophage cells.

scholarly journals Antioxidant Sesquiterpenes from Penicillium citreonigrum

2017 ◽  
Vol 12 (12) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Wei-Hua Yuan ◽  
Ying Zhang ◽  
Peng Zhang ◽  
Ru-Ru Ding
Keyword(s):  
Ascorbic Acid ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Mycophenolic Acid ◽  
Endophytic Fungus ◽  
Spectroscopic Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Antioxidant Capacities

A new chlorinated 11-noreremophilane-type sesquiterpene (1) together with 3-epiisopetasol, PR-amide and mycophenolic acid (2–4) were isolated from endophytic fungus Penicillium citreonigrum. The structures of 1–4 were elucidated by a combination of spectroscopic data and single-crystal X-ray diffraction analysis. Among them, compounds 1 and 4 showed moderate antioxidant capacities compared with ascorbic acid at 0.2 mM concentration.

scholarly journals Bousmekines A-E, New Alkaloids from Two Bousigonia Species: B.angustifolia and B. mekongensis

2020 ◽  
Author(s):  
Zong-Qing Huo ◽  
Qian Zhao ◽  
Wen-Tao Zhu ◽  
Xiao-Jiang Hao ◽  
Yu Zhang
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Chlorine Atom ◽  
Human Cancer ◽  
Indole Alkaloids ◽  
Human Cancer Cell ◽  
X Ray Diffraction ◽  
Monoterpenoid Indole Alkaloids ◽  
X Ray ◽  
Human Cancer Cell Lines

Abstract Four new monoterpenoid indole alkaloids, bousmekines A-D (1–4), and one new pyranopyridine alkaloid, bousmekine E (5), were isolated from the twigs and leaves of Bousigonia angustifolia and Bousigonia mekongensis. Their structures including absolute configurations were elucidated by a combination of MS, NMR, ECD calculation, and single-crystal X-ray diffraction analysis. Compound 2 was an eburnea-type MIAs characterized by a rare chlorine atom while 5 possessed a novel pyranopyridine moiety. Their cytotoxicities against several human cancer cell lines were evaluated and compound 1 exhibited significant cytotoxicity with IC50 values of 0.8–7.4 μM. Graphic Abstract

Crystal structure of aristoserratine

1983 ◽  
Vol 36 (5) ◽  
pp. 1037 ◽  
Author(s):  
IRC Bick ◽  
MA Hai ◽  
VA Patrick ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Circular Dichroism ◽  
Single Crystal ◽  
Absolute Configuration ◽  
Circular Dichroism Spectrum ◽  
X Ray Diffraction ◽  
Relative Configuration ◽  
X Ray ◽  
The Absolute ◽  
Circular Dichroïsm

The crystal structure of the alkaloid aristoserratine,* C20H24N2O, has been determined by single-crystal X-ray diffraction methods at 295 K, the structure being refined to a residual of 0.034 for 1107 independent 'observed' reflections. Crystals are monoclinic, P21, a 14.836(5), b 8.568(3), c 6.633(3) �, β 98.05(3)�, Z 2. The relative configuration is established and, by inference, by comparison of the circular dichroism spectrum with that of aristoteline, the absolute configuration is assigned.

Synthesis of 4-(3-coumarinyl)-3-benzyl-4-thiazolin-2-one 4-methylbenzylidenehydrazone and determination of the isomeric structure by X-ray analysis

2003 ◽  
Vol 218 (12) ◽  
Author(s):  
Süheyla Özbey ◽  
Nilgün Karalı ◽  
Aysel Gürsoy
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Spectral Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isomeric Structure ◽  
Elemental Analyses

AbstractIn this study 4-(3-coumarinyl)-3-benzyl-4-thi azolin-2-one 4-methylbenzylidenehydrazone 3 was synthesised. An independent proof of the thiazolylhydrazone structure of 3 was achieved by single crystal X-ray diffraction analysis. Elemental analyses and spectral data (IR,

Single-crystal X-ray diffraction analysis of nonplanar autoepitaxial silicon layers

2009 ◽  
Vol 45 (14) ◽  
pp. 1610-1613
Author(s):  
V. T. Bublik ◽  
L. V. Kozhitov ◽  
T. T. Kondratenko
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

New iboga-type alkaloids from Ervatamia hainanensis

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30277-30284 ◽  
Author(s):  
Zhi-Wen Liu ◽  
Xiao-Jun Huang ◽  
Han-Lin Xiao ◽  
Guo Liu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Spectroscopic Data ◽  
X Ray Diffraction ◽  
X Ray

The structures and absolute configurations of seven new iboga-type alkaloids 1–7 were determined by spectroscopic data, Mosher's method, single crystal X-ray diffraction and ECD analyses.

Functionalized triphenylphosphine oxide-based manganese(II) complexes for luminescent printing

2021 ◽  
Author(s):  
Xiaomeng Huang ◽  
Yanyan Qin ◽  
Pengfei She ◽  
Haixing Meng ◽  
Shu-Juan Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Triphenylphosphine Oxide ◽  
X Ray Diffraction ◽  
X Ray

Three novel neutral manganese(II) complexes (TPhPONMe2)2MnBr2, (TPhPOOMe)2MnBr2, and (TPhPOCF3)2MnBr2 have been designed and synthesized based on functionalized Ph3PO ligand. These structures are clarified by single crystal X-ray diffraction analysis, which...

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