Simultaneous analysis of anthocyanins and flavonols in petals of Lotus (Nelumbo) cultivars by high performance liquid chromatography photodiode array detection electrospray ionization mass spectrometry - Yang, R Z; Wei, X L; Gao, F F; Wang, L S; Zhang, H J; Xu, Y J; Li, C H; Ge, Y X; Zhang, J J; Zhang, J (J Chromatogr A, 2009)