Taraxacin, a new guaianolide from Taraxacum wallichii.
A new guaianolide, taraxacin (1), and a known sesquiterpene ketolactone (2) have been isolated from an ethyl acetate-soluble part of a methanolic extract of Taraxacum wallichii. The structure of 1 was established using NMR, MS, and X-ray crystallographic methods. The (13)C NMR data of 2 is also being reported for the first time.
Ahmad
V U
VU
H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan. viqar@khi.comsats.net.pk
Yasmeen
S
S
Ali
Z
Z
Khan
M A
MA
Choudhary
M I
MI
Akhtar
F
F
Miana
G A
GA
Zahid
M
M
D019659:Asteraceae / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D013057:Spectrum Analysis
D006575:Heterocyclic Compounds, 3-Ring; C413041:taraxacin