1. Antibacterial effect The alcoholic extract of P. Viviparum has strong antibacterial effect, and the pathogenic microorganisms with antibacterial potency above 1:128 include Staphylococcus aureus, Streptococcus aureus and Streptococcus bisporus, Streptococcus pneumoniae, Fusarium dysentery bacillus, and Escherichia coli, etc.[1]. The decoction of P. Viviparum rhizome has strong antimicrobial effect against Staphylococcus aureus, Neisseria catarrhalis, Streptococcus dysenteriae type A and S. paratyphi type A. The antimicrobial effect is weakened by removal of tanning. In addition to Candida albicans and Candida tropicalis

have a weak antifungal effect [2]. The active ingredient of the antimicrobial effect of the rhizome of Polygonum multiflorum is gallic acid, and its antimicrobial potency against Shigella and Fusarium dysentery bacillus was 16.62 μg/ml and 31.25 μg/ml, respectively, and the strength of its action was similar to that of safranin[3].

2. Antiviral effect The decoction of Polygonum multiflorum rhizome showed obvious antiviral effect on Asian influenza A virus (Keike 68-1) and type I parainfluenza virus (Sendai strain) in chick embryo test. The intra-embryonic test in chickens 10.25% 0.16 ml injected into the urinary bladder cavity, administered before, at the same time or after infection, showed inhibitory effects on both viruses [2]. The rhizome of Polygonum taipaishanense (P. taipaishanense) is an effective drug against rotavirus and is used for the treatment of autumn diarrhea in infants and children[4].

Chemical composition Fifteen compounds were isolated and identified from the whole herb of Scorpion VII, two of which were new compounds. Nine known compounds were reported: ferulic acid, 4-stigmasten-3-one, lilacoside, 5,8,2′-trihydroxy-5′-methoxydihydroflavone, isorhamnetin, quercetin-3-O-rhamnetin, sanguinarine-3-O-β-D-glucoside, yangnin-7-O-β-D-glucoside, and 5-hydroxy-4-methoxysaflavone-7-O-β-rutinoside. 7-valent C,N , O