| abstract |
The present invention provides a novel compound having a protein, tyrosine, phosphatase inhibitory action and the like. SOLUTION: The following general formula (I) Embedded image [Wherein, X represents a single bond, -O-, or -CONH- (where the nitrogen atom of the amide group is bonded to a phenyl ring), and R 1 is a substituted or unsubstituted C 1-6 carbon atom. An alkyl group or a substituted or unsubstituted aryl group; R 2 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group having 3 to 20 carbon atoms (the aryl group is one or more And a hetero atom may be contained as a ring-constituting atom). Or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable ester thereof. |