A compound of the formula: ##STR1## wherein R is a C.sub.2 -C.sub.3 alkyl group, a C.sub.3 -C.sub.4 alkenyl group or a C.sub.3 -C.sub.4 alkynyl group and X is a chlorine atom or a bromine atom, which is useful as a herbicide.
一种化合物的分子式为:##STR1## 其中R是一个C.sub.2-C.sub.3烷基、一个C.sub.3-C.sub.4烯基或一个C.sub.3-C.sub.4炔基,X是一个
氯原子或
溴原子,可用作
除草剂。