Results 31 to 40 of about 15,472 (254)

Tetraoxygenated naturally occurring xanthones

Phytochemistry, 2000
This review, with 350 references, gives information on the chemical study of 234 naturally occurring tetraoxygenated xanthones in 12 families, 53 genus and 182 species of higher plants, and two which are described as fungal and lichen metabolites. The value of these groups of substances in connection with pharmacological activity and therapeutic use of
V, Peres, T J, Nagem, F F, de Oliveira
openaire   +3 more sources

Xanthone biosynthesis and accumulation in calli and suspended cells of Hypericum androsaemum [PDF]

, 2000
Calli and suspended cells of Hypericum androsaemum accumulated high levels of 1,3,5,6 and 1,3,6,7 oxygenated xanthones. The major compounds include simple oxygenated xanthones or derivatives with prenyl, pyran or methoxyl groups, four of them being new
Andrade, Paula B., Dias, Alberto Carlos Pires, Ferreira, Manuel Fernandes, Ferreres, Federico, Seabra, Rosa M.   +4 more
core   +1 more source

Synthesis, Biological Evaluation, and In Silico Studies of Novel Aminated Xanthones as Potential p53-Activating Agents

Molecules, 2019
Xanthone scaffold has been regarded as an attractive chemical tool in the search for bioactive molecules with antitumor activity, and in particular two xanthone derivatives, 12-hydroxy-2,2-dimethyl-3,4-dihydro-2H,6H-pyrano [3,2-b]xanthen-6-one (4) and 3 ...
Agostinho Lemos, Ana Sara Gomes, Joana B. Loureiro, Pedro Brandão, Andreia Palmeira, Madalena M. M. Pinto, Lucília Saraiva, Maria Emília Sousa   +7 more
doaj   +1 more source

Quantitative structure–activity relationship (QSAR) and molecular docking of xanthone derivatives as anti-tuberculosis agents

Journal of Clinical Tuberculosis and Other Mycobacterial Diseases, 2020
Quantitative structure–activity relationship (QSAR) and molecular docking approach were carried out to design novel anti-tuberculosis agents based on xanthone derivatives.
Emmy Yuanita, Sudirman, Ni Komang Tri Dharmayani, Maria Ulfa, Jufrizal Syahri   +4 more
doaj   +1 more source

Characterization of Antioxidant and α-Glucosidase Inhibitory Compounds of Cratoxylum formosum ssp. pruniflorum and Optimization of Extraction Condition

Antioxidants, 2023
Cratoxylum formosum ssp. pruniflorum (Kurz.) Gogel (Guttiferae), called kuding tea, is widely distributed in Southeast Asia. In this study, the constituents and biological activity of C. formosum ssp. pruniflorum were investigated. Extract of its leaves,
Heewon An, Le Nguyen Thanh, Le Quoc Khanh, Se Hwan Ryu, Solip Lee, Sang Won Yeon, Hak Hyun Lee, Ayman Turk, Ki Yong Lee, Bang Yeon Hwang, Mi Kyeong Lee   +10 more
doaj   +1 more source

Reactive trityl derivatives: stabilised carbocation mass-tags for life sciences applications [PDF]

, 2008
The rational design of novel triarylmethyl (trityl)-based mass tags (MT) for mass-spectrometric (MS) applications is described. We propose a "pKR+ rule" to correlate the stability of trityl carbocations with their MS performance: trityls with higher pKR+
Astakhova, Irina Kira, Astakhova, Irina V., Bernad, Pablo L., Khan, Safraz, Korshun, Vladimir A., Malakhov, Andrei D., Patel, Kaajal, Prokhorenko, Igor A., Shahgholi, Mona, Shchepinov, Mikhail S., Shmanai, Vadim V., Skorobogatyi, Mikhail V., Southern, Edwin M., Stepanova, Irina A., Ustinov, Alexey V.   +14 more
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Xanthone biosynthesis in Hypericum perforatum cells provides antioxidant and antimicrobial protection upon biotic stress [PDF]

, 2009
Xanthone production in Hypericum perforatum (HP) suspension cultures in response to elicitation by Agrobacterium tumefaciens co-cultivation has been studied. RNA blot analyses of HP cells co-cultivated with A.
Conceição, Luís F. R., Dias, Alberto Carlos Pires, Franklin, Gregory, Kombrink, E.   +3 more
core   +1 more source

LC-QTOF-MS analysis of xanthone content in different parts of Garcinia mangostana and its influence on cholinesterase inhibition

Journal of Enzyme Inhibition and Medicinal Chemistry, 2020
Mangosteen is one of the best tasting tropical fruit widely cultivated in Southeast Asia. This study aimed to quantify xanthone content in different parts of Garcinia mangostana by LC-QTOF-MS and determine its influence on their cholinesterase inhibitory
Kooi Yeong Khaw, Chun Wie Chong, Vikneswaran Murugaiyah   +2 more
doaj   +1 more source

Potency of Xanthone Derivatives as Antibacterial Agent Against Methicillin-Resistant Staphylococcus Aureus (MRSA) [PDF]

, 2017
Antibiotic resistance is increasing worldwide and becoming a serious problem for the treatment of patients and also affecting their economy. One instance of bacteria that is resistant to the antibiotic is Methicillin- Resistant Staphylococcus aureus ...
Miladiyah, I. (Isnatin), Rachmawaty, F. J. (Farida)   +1 more
core   +2 more sources

Chemometrically Assisted Optimization of Pregabalin Fluorescent Derivatization Reaction with a Novel Xanthone Analogue and Validation of the Method for the Determination of Pregabalin in Bulk via a Plate Reader

Molecules, 2022
Quantitation of chromophore-free analytes is always a challenge. To this purpose, derivatization of the analyte constitutes a common strategy, leading to a product with a strong signal. In the current study, a novel xanthone analogue was utilized for the
Nikolaos Kritikos, Aikaterini Iliou, Amalia D. Kalampaliki, Evangelos Gikas, Ioannis K. Kostakis, Benoît Y. Michel, Yannis Dotsikas   +6 more
doaj   +1 more source