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.