Results 91 to 100 of about 46,318 (209)

Charakterisierung zweier neuer antioxidativer Tetrahydroxyxanthone in Hypericum-Samen und rasterelektronenmikroskopische Untersuchung der Testa

open access: yesJulius-Kühn-Archiv, 2018
Hypericum seeds have recently been identified as a natural source of different xanthone derivatives. Two main constituents, the tetrahydroxyxanthones THX-1 and -2, were identified in methanolic extracts of H. perforatum and H.
Lorenz, Peter   +7 more
doaj   +1 more source

Anti-Tumor Xanthones from Garcinia nujiangensis Suppress Proliferation, and Induce Apoptosis via PARP, PI3K/AKT/mTOR, and MAPK/ERK Signaling Pathways in Human Ovarian Cancers Cells

open access: yesDrug Design, Development and Therapy, 2020
Zhongyan Tang,1,* Lihua Lu,2,* Zhengxiang Xia3 1Department of Emergency and Critical Care Medicine, Jin Shan Hospital, Fudan University, Shanghai 201508, People’s Republic of China; 2Department of Neonatology, International Peace Maternity and ...
Tang Z, Lu L, Xia Z
doaj  

Three Novel Xanthones from Garcinia paucinervis and Their Anti-TMV Activity

open access: yesMolecules, 2013
Phytochemical investigations of the leaves of Garcinia paucinervis resulted in the isolation of three new xanthones 1–3 and five known analogues 4–8. Structural elucidations of 1–3 were performed by spectral methods such as 1D and 2D (HMQC, HMBC, and ...
Qiu-Fen Hu   +6 more
doaj   +1 more source

Cytotoxic Xanthones from Hypericum stellatum, an Ethnomedicine in Southwest China [PDF]

open access: yes, 2019
Hypericum stellatum, a species endemic to China, is used to treat hepatitis by several ethnic groups in Guizhou Province. This research was inspired by the traditional medicinal usage of H.
Zhang, Ruifei   +7 more
core   +1 more source

ANTIOXIDANT ACTIVITY OF XANTHONE DERIVATIVES.

open access: yesActa 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   +3 more
openaire   +2 more sources

Studies in the Xanthone Group.

open access: yes, 1934
Studies in the Xanthone Group.
ANUKUL CHANDRA SIRCAR   +1 more
openaire   +2 more sources

Trioxygenated naturally occurring xanthones

open access: yes, 1997
This review discusses the chemistry of 127 trioxygenated xanthones occurring in six families, 37 genera and 107 species of higher plants, and 55 which are fungal or lichen metabolites.
Nagem, Tanus Jorge, Peres, Valdir
core   +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

open access: yes, 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   +9 more
core  

Isolamento e caracterização de stirilpironas e Cumarinas de polygala sabulosa e avaliação da atividade Ansiolítica [PDF]

open access: yes, 2003
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.No presente trabalho, a reinvestigação fitoquímica da espécie P.
BASTOS, Juliana
core  

A new insight into cardiovascular protective potentials of hydroxylated xanthones

open access: yes
Natural products play important roles as origins of new cardiovascular drugs. Xanthones are polyphenolic compounds that carry a dibenzo-γ-pyrone skeleton and exhibit a broad range of pharmacological activities.
Ng, Chin Theng   +5 more
core   +1 more source

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