| abstract |
A pyrazole-3-one derivative of formula 1 or a non-toxic salt thereof, a preparation method thereof, and a. pharmaceutical composition containing the derivative or the salt as an active ingredient are provided: n n n wherein: n R 1 and R 2 each independently represent C 1 -C 3 alkyl, aryl, or substituted aryl; n R 3 represents amino or methyl; n R 4 and R 5 each independently represent hydrogen, C 1 -C 3 alkyl, halogen, methyl substituted with halogen, C 1 -C 3 alkoxy, cyano, or nitro; n or a non-toxic salt thereof. |