Novel ester compound and pin1 inhibitor, inflammatory disease therapeutic, and colon cancer therapeutic in which said ester compound is used

A compound represented by Formula (I):

• wherein
• m represents an integer of 0 to 3, and n represents an integer of 0 to 2, with the proviso that 1≤m+n≤3;
• R1 represents a hydrogen atom, a hydrocarbon group optionally having a substituent(s), a heterocyclic group optionally having a substituent(s), or an amino group optionally having a substituent(s);
• R2 represents a polycyclic aryl group optionally having a substituent(s), a heterocyclic group optionally having a substituent(s), an aryloxy group optionally having a substituent(s), a phenyl group having a substituent(s), an aralkyl group having a substituent(s), or a group represented by the following Formula (II):
• wherein Ring A and Ring B each represent a monocyclic or polycyclic aryl group or heterocyclic group optionally having a substituent(s);
• R4 represents a single bond, a C1-3 alkylene group optionally having a substituent(s), a C2-3 alkenylene group optionally having a substituent(s), or a divalent oxy group;
• and the Ring A, Ring B, or R4 moiety is linked to X;
• R3 represents 0 to 7 substituent(s) linked to the naphthyl group, each of which substituent(s) is the same or different and has 1 to 10 atoms;
• and
• X represents a single bond, a C1-6 alkylene group optionally having a substituent(s), a C2-6 alkenylene group optionally having a substituent(s), an —R5—NH— group, an —NH—R5— group, wherein R5 represents a C1-5 alkylene group optionally having a substituent(s), or a C2-5 alkenylene group optionally having a substituent(s)), or a secondary or tertiary amino group;
• or a salt thereof.