Patent ID: 7420060

Claim:
A benzopyran compound substituted with a thioxobenzoxazole derivative represented in <Formula 1>: wherein, R 1 is NO 2 , NH 2 , H, CN, NHCOCH 3 , NHCOPh, NHCOCF 3 or NHSO 2 CH 3 ; R 2 is CH 2 OR a , CO 2 R a or R a wherein, R a is C 1 ˜C 4 straight or branched alkyl; and Z is C 2 ˜C 6 straight or branched alkyl; R 3 is OH or OCOCH 3 ; R 4 and R 5 are independently H, C 1 ˜C 4 straight or branched alkyl, Cl, Br, F, NO 2 , OMe, CO 2 Me or CF 3 ; and * represents a chiral carbon, or a pharmaceutically acceptable salt thereof.