The present invention relates to novel non-steroidal brassinosteroid mimetic derivatives of formula (I) as defined herein, to processes and intermediates for preparing them, to plant growth regulator compositions comprising them and to methods of using them for controlling the growth of plants and/or promoting the germination of seeds.本發明涉及如在此定義的具有式(I)之新穎的非類固醇的菜籽類固醇模擬衍生物、製備它們之方法與中間體、包括它們的植物生長調節劑組合物、以及將它們用於控制植物生長和/或促進種子萌發之方法。