油菜素内酯是一种植物激素,含有七元B-环内酯的一种自然类固醇,能促进两种细胞伸长和细胞分裂并用作植物生长调节剂。可溶于甲醇、乙醇、四氢呋喃、丙酮等有机溶剂。;Brassinolide is a plant hormone; a natural steroid containing a seven-membered B-ring lactone, that promotes both cell elongation and cell devision and is used as a plant growth regulator.A plant growth regulator