1. The three different preparation methods of cyclic trioligomer are described in this paper. The chromatographically pure compound was obtained.
   文章叙述了三种制备环状三聚体的方法;获得了色谱纯的化合物。

声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。