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Structural characterization of flavonol 3,7-di-O-glycosides and determination of the glycosylation position by using negative ion electrospray ionization tandem mass spectrometry.
Flavonol 3,7-di-O-glycosides were investigated by negative ion electrospray ionization tandem mass spectrometry using a quadrupole linear ion trap (LIT) mass spectrometer. The results indicate thatExpand
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Structures, biogenesis, and biological activities of pyrano[4,3-c]isochromen-4-one derivatives from the Fungus Phellinus igniarius.
Further chemical investigation of the Chinese medicinal fungus Phellinus igniarius has resulted in the isolation and structural elucidation of three pyrano[4,3-c]isochromen-4-one derivatives,Expand
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Anti-apoptotic effect of esculin on dopamine-induced cytotoxicity in the human neuroblastoma SH-SY5Y cell line
Dopamine (DA), as a neurotoxin, can elicit severe Parkinson's disease-like syndrome by elevating intracellular reactive oxygen species (ROS) levels and apoptotic activity. In this study, we examinedExpand
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Phelligridimer A, a highly oxygenated and unsaturated 26-membered macrocyclic metabolite with antioxidant activity from the fungus Phellinus igniarius.
[structure: see text] A highly oxygenated and unsaturated 26-membered macrocyclic metabolite, phelligridimer A (1), has been isolated from the Chinese medicinal fungus Phellinus igniarius. ItsExpand
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Chemical constituents of Pyrrosia petiolosa
The new flavone diglycoside 7-O-[6-O-(α-L-arabifuranosyl)-β-D-glucopyranosyl]-gossypetin, named as pyrropetioside, along with 13 known compounds (including 3 artifacts) have been isolated fromExpand
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DJ-1 regulating PI3K-Nrf2 signaling plays a significant role in bibenzyl compound 20C-mediated neuroprotection against rotenone-induced oxidative insult.
Oxidative stress is thought to be involved in the development of Parkinson's disease (PD). We previously reported that 20C, a bibenzyl compound isolated from Gastrodia elata, possesses antioxidativeExpand
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Antiviral glycosidic bisindole alkaloids from the roots of Isatis indigotica
Seven new glycosidic bisindole alkaloids, isatindigobisindolosides A–G (1–7), were isolated from an aqueous extract of the Isatis indigotica roots. Their structures including absolute configurationsExpand
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Diterpenoid alkaloids from the lateral root of Aconitum carmichaelii.
Twenty-six new diterpenoid alkaloids, 1-26 (1-4: hetisan-type C(20)-diterpenoid alkaloids; 5-26: aconitane C(19)-diterpenoid alkaloids), and two known analogues, hypaconitine 27 and benzoylmesaconineExpand
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Mechanisms of the vasorelaxant effect of 1-hydroxy-2, 3, 5-trimethoxy-xanthone, isolated from a Tibetan herb, Halenia elliptica, on rat coronary artery.
1-Hydroxy-2, 3, 5-trimethoxyxanthone (HM-1) is a xanthone isolated from Halenia elliptica, a Tibetan medicinal herb. HM-1 (0.33-42.1 microM) produced a concentration-dependent relaxation in ratExpand
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Cytotoxic triterpenoid glycosides from the roots of Gordonia chrysandra.
Eight new oleanane triterpenoid glycosides, gordonosides A-H (1-8), were isolated from a 50% EtOH extract of the roots of Gordonia chrysandra. Their structures were determined by spectroscopicExpand
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