The extracts of Cortex Magnoliae Officinalis, Herba Houttuyniae aerial parts and Folium Murraya Koenigii (ethanolic extract) had similar high DDPH radical scavenging activities (>85%) but markedly different antimicrobial properties ( Figure 2 and Table 3 ). The results suggest that the active components for antimicrobial and antioxidant activities do not share common biochemical pathways.