“…The major functional component of H. cordata is the essential oil from the Houttuynia cordata sold in China, and it has one trade name 'Yuxingcao' , obtained by hydrodistillation. It has been reported that H. cordata has anti-microbial, immunostimulatory, diuretic, anticancer, sedative, anti-inflammatory, anti-allergic and antitussive effects (Park et al, 2005;Li et al, 2005;Lu et al, 2006;Kim et al, 2007). H. cordata has antiviral activities against herpes simplex virus type 1 (HSV-1), influenza virus and HIV as well as SARS-CoV (Hayashi et al, 1995;Chiang et al, 2003;Ono et al, 2006;Lau et al, 2008).…”