Agonists of protein tyrosine phosphatase SHP-1

A compound having a chemical structure below:

• wherein n is 0 or 1;
• X is N or C—R1;
• R1 is H or Cl;
• R2 and R3 are H, a halide or an alkyl group independently;
• Ar is an unsubstituted or substituted phenylene group or a naphthalenylene group, wherein the substituted phenylene group is
• and the naphthalenylene group is
• R4 is H, a halide or an alkyl group;
• R5 is H, a halide, an alkyl group, an alkoxyl group or a hydroxyl group;
• R6 is H or a hydroxyl group;
• R7 is a substituted phenyl group, a substituted
• wherein the substituted phenyl group is selected from one of
• and
• wherein the substituted
• is selected from one of
• and
• wherein, when R7 is
• R2, R3, R4, R5, and R6 are not H at a same time.