Results 21 to 30 of about 6,787 (215)

5,8-Dihydroxy-2,2-dimethyl-12-(3-methylbut-2-enyl)pyrano[3,2-b]xanthen-6-one (brasixanthone B)

IUCrData, 2023
The title compound (trivial name brasixanthone B), C23H22O5, isolated from Calophyllum gracilentum, is characterized by a xanthone skeleton of three fused six-membered rings plus an additional fused pyrano ring and one 3-methylbut-2-enyl side chain.
Nurr Maria Ulfa Binti Seruji, Mohd Mustaqim Rosli, Vivien Yi Mian Jong, Thiruventhan Karunakaran, Mas Atikah Lizazman, Anita Marlina, Yanti Yana Binti Halid   +6 more
doaj   +1 more source

Xanthones with Antiproliferative Effects on Prostate Cancer Cells from the Stem Bark of

Natural Product Communications, 2012
Investigations of the constituents of the stem barks of Garcinia xanthochymus have yielded two new compounds, garcinenones X (1) and Y (2), along with five known xanthones, 1,4,5,6-tetrahydroxy-7-(3-methylbut-2-enyl)xanthone (3), 1,4,6-trihydroxy-5 ...
Feng Ji, Zhanlin Li, Gaofeng Liu, Shengli Niu, Nan Zhao, Xiaoqiu Liu, Huiming Hua   +6 more
doaj   +1 more source

Cytotoxic Xanthones from the Leaves of

Natural Product Communications, 2007
Two new xanthones, 7-hydroxydesoxymorellin ( 1 ) and isocaledonixanthone D ( 2 ), and four known ones, gaudichaudione H, 1,7-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, 1,5-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, and 1,3,7-trihydroxy ...
Rozida Mohd Khalid, Md. Lip Jabit, Faridah Abas, Johnson Stanslas, Khozirah Shaari, Nordin H. Lajis   +5 more
doaj   +1 more source

Chemical Constituents From the Bark of

Natural Product Communications, 2020
The phytochemical investigation of the methanol extract of bark of Garcinia oblongifolia yielded a new xanthone derivative 1,3,8-trihydroxy-6’,6’-dimethylpyrano (2’,3’:5,6) xanthone ( 5 ) along with 8 known compounds, including 1,2,5-trihydroxy-6 ...
Yutong Han, Xingyu Li, Chaonan Yuan, Ronghui Gu, Edward J. Kennelly, Chunlin Long   +5 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

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

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

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

Antiprotozoal and Antibacterial Activity of Ravenelin, a Xanthone Isolated from the Endophytic Fungus Exserohilum rostratum

Molecules, 2021
The natural compound ravenelin was isolated from the biomass extracts of Exserohilum rostratum fungus, and its antimicrobial, antiplasmodial, and trypanocidal activities were evaluated.
Jeferson Rodrigo Souza Pina, João Victor Silva-Silva, Josiwander Miranda Carvalho, Heriberto Rodrigues Bitencourt, Luciano Almeida Watanabe, Juan Matheus Pereira Fernandes, Guilherme Eduardo de Souza, Anna Caroline Campos Aguiar, Rafael Victorio Carvalho Guido, Fernando Almeida-Souza, Kátia da Silva Calabrese, Patrícia Santana Barbosa Marinho, Andrey Moacir do Rosario Marinho   +12 more
doaj   +1 more source

Donor–Acceptor Pentacene Analogues With Near‐Infrared Emission and Tunable Aromaticity

Angewandte Chemie, Volume 138, Issue 20, 11 May 2026.
Air‐ and photostable heterocyclic pentacene analogues with donor and acceptor groups flanking a para‐quinodimethane core exhibit large dipole moments, narrow bandgaps, reversible redox behavior, and NIR‐I to NIR‐II absorption and emission with pronounced solvatochromism.
Krzysztof Nowak, Olaf Morawski, Muhammad Yasir Mehboob, Maja Morawiak, Krzysztof Noworyta, Cina Foroutan‐Nejad, Marek Grzybowski   +6 more
wiley   +2 more sources