Identification and characterization of five new classes of chlorogenic acids in Burdock (Arctium lappa L.) roots by liquid chromatography/tandem mass spectrometry Rakesh Jaiswal and Nikolai Kuhnert* Supporting Information Table S1. High resolution mass (MS-TOF) data of chlorogenic acids and their parent ions (M-H). Table S2. Negative ion MS 4 fragmentation data for the chlorogenic acids (5-19). Supplementary Material (ESI) for Food & Function This journal is (c) The Royal Society of Chemistry 2010