| 摘要 |
Compounds of the formula <IMAGE> wherein R1 is chloro, bromo, cyano, nitro, alkylsulfonyl, substituted alkylsulfonyl, phenylsulfonyl or substituted phenylsulfonyl, R2 is hydrogen, chloro or bromo, R3 is hydrogen, chloro, bromo or acylamino, with the proviso that at least one of R2 and R3 is hydrogen, R4 is hydrogen, alkyl, substituted alkyl, alkoxy or substituted alkoxy, EACH OF R5 and R6 is independently alkyl or substituted alkyl, wherein each substituent of substituted alkyl is independently chloro, bromo, cyano, hydroxy, alkoxy, chloroalkoxy, bromoalkoxy, cyanoalkoxy, formyloxy, alkylcarbonyloxy, substituted alkylcarbonyloxy, benzoyloxy, substituted benzoyloxy, alkoxycarbonyl, substituted alkoxycarbonyl, phenoxycarbonyl, substituted phenoxycarbonyl, alkoxycarbonyloxy, substituted alkoxycarbonyloxy, phenoxycarbonyloxy or substituted phenoxycarbonyloxy, R7 is alkyl or substituted alkyl, X is -CO-, -CO2- or -SO2-, and n is 2, 3 or 4.
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