brassinosteroids with very high specific activity is reported. A 3H-labeled 24-epicastasterone was isolated in high yield (40 mCi), radiochemical purity (>97%) and a specific activity up to 99 Ci mmol−1. The labeling strategy was designed to employ a radiolabeling step at the late stage of the synthetic sequence.
据报道,合成具有高比活度的tri标记的油菜素类
固醇的简便方法。阿3 H标记24 epicastasterone物以高产率(40毫居里),放射
化学纯度(> 97%)和比活度高达隔离,以99次毫摩尔-1。标记策略设计为在合成序列的后期采用放射性标记步骤。