A compound of the formula: ##STR1## wherein R is a C.sub.1 -C.sub.5 alkyl group, a C.sub.3 -C.sub.4 alkenyl group, a C.sub.3 -C.sub.4 alkynyl group, a C.sub.1 -C.sub.2 alkoxy(C.sub.1 -C.sub.2)alkyl group, a C.sub.1 -C.sub.2 alkylthio(C.sub.1 -C.sub.2)alkyl group or a mono- or polyfluoro(C.sub.1 -C.sub.3)alkyl group, X is a C.sub.1 -C.sub.4 alkylene group which may be substituted with at least one methyl or a --OCH.sub.2 -- group and n is an integer of 0, 1 or 2, which is useful as a herbicide.
一种化合物的
化学式:##STR1## 其中R是C.sub.1-C.sub.5烷基,C.sub.3-C.sub.4烯基,C.sub.3-C.sub.4炔基,C.sub.1-C.sub.2烷氧基(C.sub.1-C.sub.2)烷基,C.sub.1-C.sub.2烷
硫基(C.sub.1-C.sub.2)烷基或单或多
氟(C.sub.1-C.sub.3)烷基,X是C.sub.1-C.sub.4烷基,可以用至少一个甲基或--OCH.sub.2--基取代,n是0、1或2的整数,可用作
除草剂。