[EN] SUBSTITUTED PHENYLPROPENYLPYRIDINE DERIVATIVE, AND PREPARATION METHOD THEREFOR AND MEDICAL USE THEREOF<br/>[FR] DÉRIVÉ DE PHÉNYLPROPÉNYLPYRIDINE SUBSTITUÉ, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION MÉDICALE<br/>[ZH] 取代的苯基丙烯基吡啶类衍生物,其制法与医药上的用途
The present invention relates to novel herbicidal compounds of Formula (I), or an agronomically acceptable salt of said compound wherein X1, X2, R1, R2, R3, m and Q are as defined herein. The invention further relates to processes and intermediates for the preparation of the novel herbicidal compounds, to compositions which comprise the herbicidal compounds, and to their use for controlling weeds, in particular in crops of useful plants.