Compounds of the formula I or salts thereof ##STR1## where R.sup.1 is H or an aliphatic radical; R.sup.2 and R.sup.3 are H, alkyl or phenyl; W is O, S, NR.sup.4 or NOR.sup.4 ; X is CHR.sup.2, O or NR.sup.4 ; L is a (substituted) phenyl, naphthyl or monocyclic heteroaryl radical, A is a (substituted) pyrimidyl, triazinyl, triazolyl or bicyclic heteroaryl radical, and m and n are 0 or 1, have advantageously herbicidal or plant growth-regulating properties.
化合物I的式或其盐##STR1##其中R.sup.1为H或脂肪基; R.sup.2和R.sup.3为H、烷基或苯基; W为O、S、NR.sup.4或NOR.sup.4; X为CHR.sup.2、O或NR.sup.4; L为(取代)苯基、
萘基或单环杂环基; A为(取代)
嘧啶基、三嗪基、三唑基或双环杂环基,m和n为0或1,具有除草或植物生长调节性能。