| abstract |
A compound represented by the following formula A as an indazole derivative: ** Formula ** ** (See formula) ** where R1 is nitro or Y-carbonyl, where Y is hydroxy, C1-30 alkoxy, or C2 heterocycloalkyl -30 containing nitrogen as a heteroatom; R2 is hydroxyl, halogen, phenyl, or C2-30 alkenyl; wherein the phenyl at R2 is unsubstituted or substituted with hydroxyl, halogen, C1-5 alkoxy, C1-5 alkyl, C2-5 alkenyl, or a combination thereof; R3 is hydrogen; and X is amido, sulfonamido, oxime or imidamido, provided that when R1 is nitro and X is amido, R2 is not substituted or unsubstituted phenyl. |