In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
成了10个内酯型冠
物，其中7个冠是新物，其结构
由元素分析，及红外、核磁、质谱分析
。
]内酯酸的；无水氢氧酸类的In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
成了10个内酯型冠物，其中7个冠是新物，其结构由元素分析，及红外、核磁、质谱分析。
明：以上例句、词性分类
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