Studies on Chemical Constituents from n-BuOH Extract of Folium Isatidis by HPLC/ESI-MSⁿ

High performance liquid chromatography-electrospray ionization mass spectrometry(HPLC/ESI-MSⁿ) was applied to analyze the chemical constituents from n-BuOH extract of Folium Isatidis. The data of retention time, UV spectra, molar masses and structural information on the compounds were obtained. Seventeen compounds are found in extract from n-BuOH. There are four nucleosides, two purines and eleven flavones.