Evaluation of Q-TOF-MS/MS and multiple stage IT-MSn for the dereplication of flavonoids and related compounds in crude plant extracts J.-L. Wolfender, P. Waridel, K. Ndjoko, K. R. Hobby, H. J. Major and K. Hostettmann Analusis, 28 10 (2000) 895-906 DOI: 10.1051/analusis:2000280895