Objective: To study the chemical constituents from the aerial part of Herba Cirsii.
Methods: Compounds were isolated by various chromatographic techniques and identified by spectral data.
Results: Eight compounds were obtained. Their structures were characterized as (7R,8S)-dehydroconiferyl alcohol-8,5'-dehydroconiferyl aldehyde-9-O-beta-D-glucopyranoside(I),(7S,8R)-dihydro-dehydrodiconiferyl alcohol-9-O-beta-D-glucopyranoside(II), Isokaempferide-7-O-beta-D-glucopyranoside(III), Quercetin-3-O-beta-D-gluco-pyranoside (IV), Pectolinarin (V), Rutin(VI), Sucrose(VII), beta-sitosterol(VIII).
Conclusion: Among these compounds, compounds I-IV are isolated from Herba Cirsii for the first time, Compounds first time. I and II as lignan compounds from this genus, are reported for the first time.