Abstract:
Disclosed are 4,5-diamino-3-halo-2-hydroxybenzoic acid derivatives and manufactures thereof. The 4,5-diamino-3-halo-2-hydroxybenzoic acid derivatives are presented by formula (I): wherein R1 group is H, CH3, or C2H5; R2 group is H, or Br; R3 group is CH3, or C3H7; and R4 group is H, or C(═NH)—NH2. 4,5-diamino-3-halo-2-hydroxybenzoic acid derivatives provided here were non-toxic to MDCK cells, particularly compounds 6a, 6b, 6c, 6e, 6f, 7a, 7b and 8 had better anti-H1N1 activity. In the future, these compounds can be used to focus on viral neuraminidases as targets to develop effective anti-influenza drugs.
Abstract:
Disclosed are an Schisandrae fructus extract for inhibition or prevention of influenza and its application, wherein the Schisandrae fructus extract is obtained by water, methanol, or ethanol extraction process and the extract comprises compounds such as schisandrone, benzoylgomisin P, wulignan A1, epigomisin O, epiwulignan A1, and tigloylgomisin P. The extracts and purified compounds of Schisandrae fructus has anti-influenza virus H1N1 and H1N1-TR (a Tamiflu drug resistant virus strain) activities, therefore the extracts and the purified compounds of Schisandrae fructus can be applied as an inhitibory agent of a pharmaceutical composition for treatment or prevention agent for influenza infection.
Abstract:
Disclosed are an Schisandrae fructus extract for inhibition or prevention of influenza and its application, wherein the Schisandrae fructus extract is obtained by water, methanol, or ethanol extraction process and the extract comprises compounds such as schisandrone, benzoylgomisin P, wulignan A1, epigomisin O, epiwulignan A1, and tigloylgomisin P. The extracts and purified compounds of Schisandrae fructus has anti-influenza virus H1N1 and H1N1-TR (a Tamiflu drug resistant virus strain) activities, therefore the extracts and the purified compounds of Schisandrae fructus can be applied as an inhitibory agent of a pharmaceutical composition for treatment or prevention agent for influenza infection.