Results 91 to 100 of about 44,706 (210)

Tetraoxygenated xanthones from centaurium erythraea

, 2000
Three tetraoxygenated xanthones, 1,6-dihydroxy-3,5-dimethoxyxanthone, 3-hydroxy-1,5,6-trimethoxyxanthone and 1,3,5-trihydroxy-2-methoxyxanthone, were isolated for the first time from the aerial parts of C. erythraea.
Amaral, Joana S., Valentão, Patrícia, Areias, Filipe M., Andrade, Paula B., Seabra, Rosa M.   +4 more
core   +1 more source

ANTIOXIDANT ACTIVITY OF XANTHONE DERIVATIVES.

Acta poloniae pharmaceutica, 2016
Certain xanthone derivatives, such as these present in mangosteen fruits, show strong antioxidant activity. On the other hand, evidences accumulated that oxidative stress is involved in epileptogenesis. Therefore, the aim of the present study was to estimate total antioxidant capacity (expressed as a ferric reducing antioxidant power - FRAP) and ...
Francik, Renata, Szkaradek, Natalia, Żelaszczyk, Dorota, Marona, Henryk   +3 more
openaire   +2 more sources

Analysis of caged xanthones from the resin of Garcinia hanburyi using ultra-performance liquid chromatography/electrospray ionization quadrupole time-of-flight tandem mass spectrometry

, 2008
On-line ultra high-performance liquid chromatography (UHPLC) coupled with electrospray quadrupole time-of-flight tandem mass spectrometry (ESI-QTOF-MS/MS/MS) has been developed for the analysis of a series of caged xanthones in the resin of Garcinia ...
Liu, X, Han, QB, Song, JZ, Ding, LS, Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Sichuan Prov, Peoples R China., Li, SL, Qiao, CF, Ding, LS, Zhou, Y, Yang, J, Xu, HX   +9 more
core  

Xanthones with growth inhibition against HeLa cells from Garcinia xipshuanbannaensis

, 2008
Eight prenylated xanthones, bannaxanthones A-H (1-8), together with seven known compounds, were isolated from the acetone extract of the twigs of Garcinia xipshuanbannaensis. Their structures were elucidated by spectroscopic data interpretation.
Song, Jing Zheng, Qiao, Chun Feng, Han, Quan Bin, Tian, Hong Lei, Yang, Nian Yun, Chang, Donald C., Luo, Kathy Q., Xu, Hong Xi, Chen, Shi Lin   +8 more
core   +1 more source

Xanthones of Garcinia mangostana Linn.

, 1971
Two new xanthones, gartanin and 8-desoxygartanin, have been isolated from very ripe fruits of Garcinia mangostana and their structures have been shown to be VIIa and X tespectively. Partially ripe fruits contain only mangostin and ß-mangostin.
N. Muthukumaraswamy, B.R. Pai, Govindachari, T. R., Pai, B. R., T.R. Govindachari, Muthukumaraswamy, N., Kalyanaraman, P. S., P.S. Kalyanaraman   +7 more
core   +1 more source

Recent developments in the pharmacology of prenylated xanthones

, 2016
Prenylated xanthones are secondary metabolites that are particularly common in plants belonging to the Clusiaceae family. Such compounds have been the focus intensive research because of their potential as biologically active agents. Here, we survey data
GENOVESE, Salvatore, FIORITO, SERENA, TADDEO, VITO ALESSANDRO, EPIFANO, Francesco   +3 more
core   +1 more source

Xanthones from the green branch of Garcinia dulcis

, 2016
Two new prenylated xanthones, namely dulcisxanthone H and dulcisxanthone I along with garciniaxanthone C, were isolated from the dichloromethane extract of the green branch of Garcinia dulcis. Their structures were elucidated by the analysis of 1-D and 2-
Souwalak Phongpaichit (446803), Wilawan Mahabusarakam (538429), Pattama Mecawun (2593348)   +2 more
core   +1 more source

Lichen Xanthones as Models for New Antifungal Agents

, 2018
Due to the emergence of multidrug-resistant pathogenic microorganisms, the search for new antimicrobial compounds plays an important role in current medicinal chemistry research.
Emília Sousa, Madalena M. M. Pinto, Eugénia Pinto, Paulo Martins da Costa, Diana I. S. P. Resende, Diana I. S. P. Resende, Patrícia Pereira-Terra, Paulo Martins da Costa, Ângela S. Inácio, Ângela S. Inácio, Madalena M. M. Pinto   +10 more
core   +1 more source

The Structure and Synthesis of Some Minor Xanthones From the Lichen Rinodina thiomela

, 1993
The total synthesis of the xanthones 5,7-dichloro-8-hydroxy-2-methoxy-1,3-dimethyl-9H-xanthen-9-one(10),5,7-dichloro-2,8-dihydroxy-1,3-dimethyl-9H-xanthen-9-one(11),2-dechloro-8-O-methylthiomelin (6), 2-dechlorothiomelin (8), 4-dechloro-8-O ...
JA Elix, KL Gaul, H Jiang
core   +1 more source

Anti-Inflammatory Effect of Xanthones from Hypericum beanii on Macrophage RAW 264.7 Cells through Reduced NO Production and TNF-α, IL-1β, IL-6, and COX-2 Expression

Molecules
Hypericum beanii N. Robson, a perennial upright herb, predominantly inhabits temperate regions. This species has been utilized for the treatment of various inflammation-related diseases. One new xanthone 3,7-dihydroxy-1,6-dimethoxyxanthone (1) and twenty-
Wei Ma, Fu-Cai Ren, Xue-Ru Wang, Ning Li
doaj   +1 more source