New compounds having the formula ##STR1## in which n is 0 or 1; X is halogen, C.sub.1 -C.sub.3 alkyl, trifluoromethyl or carboethoxy; Y and Z are independently hydrogen, lower alkyl, halo-lower alkyl, thio(halo-lower alkyl), lower alkoxy, nitro, cyano or halogen; provided that: if X is carboethoxy, Z in halogen and Y is hydrogen or halogen; and if Y and Z are both halogen, X is halogen, trifluoromethyl or carboethoxy. These compounds have been found to exhibit herbicidal properties.
                            新化合物的
化学式为##STR1## 其中n为0或1;X为卤素、C.sub.1-C.sub.3烷基、三
氟甲基或羧乙氧基;Y和Z独立地为氢、低烷基、卤代低烷基、
硫代(卤代低烷基)、低烷氧基、硝基、
氰基或卤素;前提是:如果X为羧乙氧基,则Z为卤素,而Y为氢或卤素;如果Y和Z都是卤素,则X为卤素、三
氟甲基或羧乙氧基。这些化合物具有除草性能。