Patent ID: 7803966

Claim:
A compound of Formula (I) wherein R 1 is COOR 10 ; Z is selected from a bond, and O—C 1-4 alkyl; R 2 is hydrogen; R 3 is hydroxyl; X is selected from the group consisting of —CH═CH— and —N═N—; R 4 is selected from the group consisting of hydroxy and —NR 15 R 16 ; R 5 is selected from the group consisting of hydrogen and —NR 15 R 16 ; R 6 is hydrogen; R 7 is hydrogen; R 8 is selected from the group consisting of hydrogen, and halo; R 9 is selected hydroxy; R 10 is hydrogen; R 15 and R 16 are each independently hydrogen; or a pharmaceutically acceptable or a cosmetically acceptable salt thereof.