Share This Author
Structural characterization of flavonol 3,7-di-O-glycosides and determination of the glycosylation position by using negative ion electrospray ionization tandem mass spectrometry.
- Keyume Ablajan, Z. Abliz, Xiao-ya Shang, Jiuming He, Ruiping Zhang, Jiangong Shi
- ChemistryJournal of mass spectrometry : JMS
- 1 March 2006
Investigation of negative ion ESI-MS(2) and MS(3) spectra of Flavonol O-glycosides allows their rapid characterization as flavonol 3,7-di-O-gly coside and their differentiation from isomeric mono-O -diglycosides, and also enables their direct analysis in crude plant extracts.
Lignans and neolignans from Sinocalamus affinis and their absolute configurations.
Twenty-two new lignans and neolignans (1-22), together with 14 known analogues, have been isolated from an ethanolic extract of the stem (with skin removed) of Sinocalamus affinis by spectroscopic and chemical methods.
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,…
Indole alkaloid sulfonic acids from an aqueous extract of Isatis indigotica roots and their antiviral activity
Sesquiterpenes from the red alga Laurencia tristicha.
Seven new sesquiterpenes (1-7), together with seven known sesQuiterpeners, together with laurebiphenyl (14) have been isolated from the red alga Laurencia tristicha and showed moderate cytotoxicity against all tested cell lines.
Bioactive neolignans and lignans from the bark of Machilus robusta.
Sixteen new neolignans and lignans (1-16), together with 12 known analogues, have been isolated from an ethanol extract of the bark of Machilus robusta, and the known compounds (-)-pinoresinol and (+)-lyoniresinol were active against serum deprivation induced PC12 cell damage.
Glycosides from the root of Iodes cirrhosa.
In the in vitro assays, compound 4 and liriodendrin both showed activity against glutamate-induced PC12 cell damage at 10 (-5) M M, and the validity of J 7,8 and Deltadelta C8-C7 values to distinguish threo and erythro derivatives was discussed.
Phelligridins C-F: cytotoxic pyrano[4,3-c]benzopyran-1,6-dione and furo[3,2-c]pyran-4-one derivatives from the fungus Phellinus igniarius.
Three unique pyrano[4,3-c]benzopyran-1,6-dione derivatives and a new furo[3,2-c]pyran-4-one, named phelligridins C-F (2-5), together with hispolon (8), (E)-4-(3,4-dihydroxyphenyl)but-3-en-2-one…
Mono-, Bi-, and triphenanthrenes from the tubers of Cremastra appendiculata.
Six newphenanthrene derivatives, including three monophenanthrenes (1-3), two biphenanthrenes (4 and 5), and a triphenanthrene (6), have been isolated from an ethanolic extract of the tubers of…
Chemical constituents of Pyrrosia petiolosa
- Chung-Che Yang, Jiangong Shi, Shun-yan Mo, Yong-chun Yang
- ChemistryJournal of Asian natural products research
- 1 June 2003
The new flavone diglycoside 7-O-[6-O-(α-L-arabifuranosyl)-β-D-glucopyranosyl]-gossypetin, named as pyrropetioside, along with 13 known compounds have been isolated from Pyrrosia petiolosa.