Patent ID: 8586580

Claim:
A compound represented by Chemical Formula 1 or a pharmaceutically acceptable salt thereof: wherein A represents 5- to 14-membered heteroaryl containing 1 to 4 heteroatom(s) selected from nitrogen, oxygen and sulfur atoms; R a represents hydrogen, halogen, oxo (═O), C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 6 alkylcarbonyl, C 1 -C 6 alkoxycarbonyl, amino C 1 -C 6 alkoxy, mono(C 1 -C 6 alkyl)amino C 1 -C 6 alkoxy, di(C 1 -C 6 alkyl)amino C 1 -C 6 alkoxy, substituted or unsubstituted heterocycle, or substituted or unsubstituted phenyl; L is nonexistent or represents —NH— or —N(C 1 -C 6 alkyl)—; B represents phenyl or 5- to 14-membered single or fused heteroaryl containing 1 to 4 heteroatom(s) selected from nitrogen, oxygen and sulfur atoms; R b represents hydrogen, nitro, amino, hydroxy, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, —(CH 2 ) n —R 1 , —C(O)OR 2 , —C(O)NR 3 R 4 , —NR 2 C(O)R 3 , —NR 2 C(O)NR 3 R 4 , —SO 2 NR 3 R 4 or —NR 2 SO 2 R 3 ; n represents an integer from 0 to 3; R 1 represents hydrogen, C 1 -C 6 alkyl, haloalkyl, hydroxy, methanesulfonyl, phenyl, or substituted or unsubstituted heterocycle; R 2 represents hydrogen or C 1 -C 6 alkyl; R 3 and R 4 , which are the same or different, represent hydrogen, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 1 -C 6 haloalkyl, or substituted or unsubstituted phenyl; the substituted phenyl is substituted with a substituent selected from halogen, C 1 -C 6 haloalkyl, carboxyl and C 1 -C 6 alkoxycarbonyl; and the substituted heterocycle represents morpholino, piperidinyl or piperazinyl substituted with a substituent selected from C 1 -C 6 alkyl and C 1 -C 6 hydroxyalkyl.