Patent ID: 7241803

Claim:
A method for inhibiting replication of human immunodeficiency virus in cells comprising contacting cells with an effective amount of a compound of the formula I, or its pharmaceutically acceptable salt and a pharmaceutically acceptable carrier, to inhibit the replication of the human immunodeficiency virus, wherein X is C; R 1 is selected from the group consisting of H and methyl; R 2 is selected from the group consisting of H, methyl and phenyl; R 3 is selected from the group consisting of H and methyl; R 4 is selected from the group consisting of H, OH and COCH; R 5 is selected from the group consisting of H, OH, Cl, COOCH 3 and COOH; R 6 is selected from the group consisting of H, Cl and COOH; R 7 is selected from the group consisting of H, OH and methyl; R 8 is selected from the group consisting of H and CHO; R 9 is H and at least one of R 4 , R 5 and R 6 is COOH—.