The present invention relates to a potent plant growth regulator. More particularly, the present invention relates to a potent plant growth regulator having the basic structure:The present invention provides a potent plant growth regulator which is capable of both inhibiting shoot branching and enhancing root formation, which is highly advantageous in agriculture, horticulture and forestry. The present invention further relates to compositions for regulating plant growth comprising the same, a process for growth regulation of plants, and the use of the compounds and compositions of the invention for growth regulation of plants.