Anthranilic acid-based compound, and Pin1 inhibitor, therapeutic agent for inflammatory diseases and therapeutic agent for cancer that use the same

A compound represented by the Formula (I), or a salt thereof:

• wherein at least one of the R1 or R2 represents an optionally substituted naphthyl group, an optionally substituted quinolyl group, or an optionally substituted phenoxy phenyl group;
• either R1 or R2 represents, if not any of the above-described groups, an optionally substituted aryl group, or an optionally substituted monocyclic heterocyclic group;
• R3 represents a hydrogen atom, an optionally substituted hydrocarbon group, or an optionally substituted heterocyclic group;
• and
• X represents a single bond, —CO— group, —CO—O—CH2— group, —CO—CH2—O— group, —SO2— group, —CH2—CO—NH— group, —CH2—CO— group, or —CH2— group.