[Chemical constituents from Neo-Taraxacum siphonathum].
OBJECTIVE
To study the chemical constituents from the antioxidant fraction of Neo-Taraxacum siphonathum.


METHODS
Various chromatographic techniques were used to isolate and purify the constituents. The structures were elucidated on the basis of chemical evidence and spectral analysis.


RESULTS
Ten compounds were isolated and identified from Neo-T. siphonathum, caffeic acid (1), chlorogenic acid (2), quercetin (3), luteolin (4), quercetin-3-O-beta-D-glucopyranoside (5), quercetin-3-O-alpha-D-arabinofuranoside (6), quercetin-3-O-alpha-D-arabinopyranoside (7), luteolin-7-O-beta-D-glucopyranoside (8), beta-sitosterol (9) and daucosterol (10).


CONCLUSIONS
Compounds 1-10 were isolated from this plant for the first time.
Shi
Shuyun
S
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. shuyshi@gmail.com
Zhou
Honghao
H
Zhang
Yuping
Y
Huang
Kelong
K
Liu
Suqin
S
D002109:Caffeic Acids / Q000737:chemistry / Q000302:isolation & purification; D002726:Chlorogenic Acid / Q000737:chemistry / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification; D047311:Luteolin / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D031205:Taraxacum / Q000737:chemistry*
D002109:Caffeic Acids; D005960:Glucosides; D012855:Sitosterols; D002726:Chlorogenic Acid; C025473:gamma-sitosterol; C066408:luteolin-7-glucoside; D011794:Quercetin; D047311:Luteolin; C040048:caffeic acid; C011015:lyoniside