| 摘要 |
Compounds of the general formula <IMAGE> wherein R1 is lower alkyl, phenyl, substituted phenyl or benzyl, R2 is lower alkyl, R3 is lower alkyl or lower alkenyl, R4 is hydrogen or lower alkoxycarbonyl, X is straight or branched chain lower alkylene, and n is 0, 1 0r 2; and metal salts and ammonium salts of the compounds defined hereinabove. The compounds are useful as herbicides. |
