Herbicidal sulfonylguanidine derivatives

摘要

Selectively herbicidal compounds of the formula <IMAGE> in which R1 is a hydrogen atom or the group <IMAGE> R2 is a hydroxy group, a lower alkoxy group or a di-lower alkylamino group, R3 and R4 each independently is a lower alkyl group or a lower alkoxy group, X is a lower alkoxy group, a lower alkylamino group or a morpholino group, and Y is N or CH.