Patent ID: 6982274

Claim:
A compound represented by the following formula, a salt thereof or a hydrate thereof: wherein R 1 is a 2-thienyl, 2-furyl, 2-benzofuryl or benzothienyl group thereof, each of which may be substituted; R 2 , R 4 and R 5 each independently represent a halogen atom, a hydroxyl group, a cyano group, a nitro group, a carboxyl group, a C 1 -C 6 alkyl group which may be substituted, a C 1 -C 6 alkoxy group which may be substituted, a C 2 -C 7 acyl group which may be substituted, —CO—NR 2a R 2b , —NR 2b CO—R 2a or —NR 2a R 2b , wherein R 2a and R 2b each independently represent a hydrogen atom or a C 1 -C 6 alkyl group which may be substituted; L is a single bond, a C 1 -C 6 alkylene group which may be substituted, a C 2 -C 6 alkenylene group which may be substituted or a C 2 -C 6 alkynylene group which may be substituted; X is a group represented by —NH—CO—(CH 2 ) t —, wherein t is 0 or 1; and Y is a hydrogen atom, a halogen atom, a nitro group, a hydroxyl group, a cyano group, a carboxyl group, a C 1 -C 6 alkyl group which may be substituted, a C 2 -C 6 alkenyl group which may be substituted, a C 2 -C 6 alkynyl group which may be substituted, a C 1 -C 6 alkoxy group which may be substituted, a C 3 -C 8 cycloalkyl group which may be substituted, a C 3 -C 8 cycloalkenyl group which may be substituted, a C 6 -C 14 aromatic cyclic hydrocarbon group which may be substituted, an amino group or —W—R 15 , wherein W is —CO— or —SO 2 —; and R 15 is a C 1 -C 6 alkyl group which may be substituted, a C 6 -C 14 aromatic cyclic hydrocarbon group which may be substituted.