| 摘要 |
The novel compounds of formula (I) wherein Het represents an optionally substituted, optionally benzofused nitrogen containing 5- or 6-membered heteroaromatic group; R<1> represents an alkyl, alkoxyalkyl or cycloalkyl group; R<2> represents a hydrogen atom, and R<3> represents an alkyl group, or R<2> and R<3> taken together form a single bond or a methylene group; and R<4>, R<5>, R<6>, R<7> and R<8> independently represent a hydrogen atom or a C1-C4 alkyl group, with the provisos that at least two of R<4>, R<5>, R<6>, R<7> and R<8> must represent an alkyl group; and 2-(5-trifluoromethyl-1,3,4-thiadiazol-2-yloxy)-N-methyl-N-(3,5,5-trimethylcyclohex-1-enyl)-acetamide is excluded; and herbicidal compositions containing such compounds as active ingredients can be utilized in various agricultural methods. |
