| abstract |
In plant growth regulators, the active ingredient used is a novel compound of the formula I <IMAGE> in which U, V, W, X, Y and Z independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, NO2, CF 3, COOH, CN, OH, SO3H, NH2 or -NH(C1-C4-alkyl) or -N(C1-C4-alkyl)2, and where U and X additionally in each case can also represent an unsubstituted phenyl radical, and in which R denotes hydrogen or the cation of a base 1 DIVIDED n M<n(+),> where M denotes an alkali metal cation, alkaline earth metal cation or an Fe, Cu, Zn, Mn or Ni cation or an ammonio radical and <IMAGE> n as an integer 1, 2 or 3 takes into consideration the valency of the cation, while R1, R2, R3 and R4 independently of one another denote hydrogen, benzyl or a C1-C4 alkyl radical which is optionally substituted by -OH, -NH2 or C1-C4-alkoxy, with the proviso that, if R is hydrogen, at least one of the substituents U-Z must be other than hydrogen. |