| abstract |
The present invention provides a compound. The compound is a compound as represented by formula (A) or a tautomer, a stereisomer, a hydrate, a solvate, a salt or a prodrug of the compound as represented by formula (A). R is R1 and R2 that are respectively independently selected from H, C1-C10 alkyl group, C3-C10 cycloalkyl, C1-C10 alkoxy group, halogen, and -CN; and R3, R4, and R5 are respectively independently selected from C1-C10 alkyl group, C3-C10 cycloalkyl, C1-C10 alkoxy group, halogen, and -CN. The premise is that when R1 is -CH3, Cl or -CN, R2 is not H, and when R1 is H, R2 is not H, -CN or -CH3. |