The free-radical-scavenging activities of the extracts and purified compounds were evaluated through Co (II) EDTA-induced luminol chemiluminescence by flow injection method Scavenging activities of the extracts and purified compounds from M. paniculate towards hydroxyl radical were assessed by Co (II) EDTA-induced luminol chemiluminescence by flow injection method described by Giokas, Vlessidis and Evmiridis with some modifications [25-27]. Briefly, the FIA (flow injection analysis) manifold was designed as shown in Figure 4.