Patent ID: 8906952

Claim:
An indole derivative represented by Formula 1 below or a pharmaceutically acceptable salt thereof: where, R 1 is —H, C 1-10 linear or branched alkyl group, C 2-10 linear or branched alkenyl group, C 3-12 cycloalkyl group, C 3-12 cycloalkyl C 1-5 alkyl group, C 5-12 aryl group, C 1-5 aryl C 1-5 alkyl group, C 5-12 aryl carbonyl group, C 1-10 linear or branched alkyl carbonyl group or C 1-10 linear or branched alkoxy carbonyl group; R 2 is C 5-12 aryl group or C 5-12 heteroaryl group including one or more of N, O and S in a ring, wherein the aryl group or heteroaryl group is non-substituted or substituted with —OH, C 1-10 linear or branched alkyl group, halogen or R 5 is —H, —OH, —NH 2 , carboxyl group, amino carbonyl group, C 1-10 linear or branched alkyl group, C 1-5 linear or branched alkoxy group, C 1-10 linear or branched alkoxy carbonyl group or C 5-12 heterocycloalkyl group including one or more of N, O and S in a ring, n is an integer between 0-5; R 3 is —H or C 1-5 linear or branched alkyl group; R 4 is —H, C 1-5 linear or branched alkyl group or halogen; X is carbonyl group or sulfonyl group; and is single or double bond.