Patent ID: 8309602

Claim:
Compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein, R 1 , R 2 and R 3 are each independently —H, halogen, —NO 2 , —NH 2 , —NHR, —N(R) 2 , —CN, —OH, C 1-6 alkyl, C 1-6 alkoxy, —CF 3 , —COOH, —SO 3 H, —CONH 2 , —CONHR′ or —COOR′, or, R 1 and R 2 or R 2 and R 3 can form together —OCH 2 O—; R 4 is —CN, —CH═CH 2 , —C≡CH, C 1-6 alkyl, C 1-6 alkoxy, —CF 3 , halogen, —NH 2 , —OH, —COOH, —SO 3 H, —C≡CR′ or —CH═CHR′; R 5 and R 6 are each independently halogen, C 1-6 alkyl, C 1-6 alkoxy, —CF 3 , —NH 2 , —OH, —COOH, —SO 3 H or COOR′; R 7 is —CN, —HC═CH—CN, halogen, C 1-6 alkyl, C 1-6 alkoxy, —NH 2 , —OH, —NO 2 , —CF 3 , —CH═CH 2 , —C≡CR′, —CH═CHR′, —CH═CHCOR′, —CHO or 5-membered heteroaryl containing 1-3 heteroatoms selected from N, O and S, and optionally having on the ring structure thereof aldehyde, ketone, cyano, α, β-unsaturated cyano, alkenyl, alkynyl, aldehyde or ketone group substitution; R′ is H or C 1-6 alkyl radical; X: —NH—, —O—, —S—, —CH 2 —, —CO—, —CHOH—, —CHOR—, —NR— or —NCOR—; and R is C 1-4 alkyl radical.