| abstract |
A compound useful as an anti-angiogenic agent is provided. The following chemical formula: Where Ar 1 is phenyl, pyridinyl, etc .; Ar 2 is benzene, pyridine, etc .; R 1 is H, C1-C6 alkyl, carboxyl, etc .; R 2 , and R 3 are independently H, Cl , F and the like; and R 4 is H, C1-C6 alkyl and the like. [Selection figure] None |