A compound of the formula:
wherein R¹ is a C₁-C₅ alkyl group, a C₃-C₄ alkenyl group, a C₃-C₄ alkynyl group or a C₁-C₂ alkoxy(C₁-C₂)alkyl group, R² is a t-butyl group or a 1-methylcyclopropyl group and X is a fluorine atom or a chlorine atom, which is useful as a herbicide.
式中 R¹ 为 C₁-C₅ 烷基、C₃-C₄ 烯基、C₃-C₄ 炔基或 C₁-C₂ 烷氧基(C₁-C₂)烷基,R² 为叔丁基或 1-甲基环丙基,X 为
氟原子或
氯原子的化合物,可用作
除草剂。