A compound of the formula:
wherein R is a C1-C6 alkyl group, a C3-C7 alkenyl group, a C3-C7 alkynyl group, a C1-C4 alkoxy(C1-C2)alkyl group, a halo(C1-C5)alkyl group, a halo(C3-C4)alkenyl group or a halo(C3-C4)alkynyl group, which is useful as a herbicide.
                            式中的化合物:
其中 R 是 C1-C6 烷基、C3-C7 烯基、C3-C7 炔基、C1-C4 烷氧基(C1-C2)烷基、卤代(C1-C5)烷基、卤代(C3-C4)烯基或卤代(C3-C4)炔基,可用作
除草剂。