| 摘要 |
The invention is concerned with herbicidally active propionic acid esters of the general formula <IMAGE> wherein R<1> represents hydrogen, C1-6 alkyl or a phenyl group, R<2> represents C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl or a phenyl group or R1 and R2 together with the carbon atom to which they are attached form a C4-10 cycloalkane ring which, if desired, can be mono-, di- or tri-substituted with C1-3 alkyl, R<3> represents a halogen atom or a trifluoromethyl or nitro group and R<4> and R<5> each represent a hydrogen or halogen atom. |
