| abstract |
Propionic acid derivatives represented by the formula (I) <IMAGE> (I) wherein X indicates an oxygen atom or a sulfur atom, Y indicates a hydrogen atom or a halogen atom, R1 and R2 are the same or different group, indicating an alkyl group, alkenyl group, alkynyl group, cycloalkyl group, lower alkoxy group, lower alkoxyalkyl group, phenyl group, respectively, or R1 and R2 may form a heterocyclic group together with a nitrogen atom bonding to said R1 and R2, and herbicidal compositions employing them. |