以下为句子列表：
英文: A study on the variation of total alkaloidal content in the genus Uncaria of Guangxi
中文: 广西钩藤属植物中总生物碱含量变化研究
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英文: STUDIES ON THE ANALYSIS OF ALKALOIDAL EXTRACT PREPARATIONS——Ⅰ.DETERMINATION OF IPECAC PREPARATIONS BY SODIUM TETRAPHENYLBORON TITRATION
中文: 生物碱类浸膏制剂分析方法的研究 Ⅰ.吐根制剂的四苯硼钠滴定法
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英文: Three new alkaloidal heterocyclic compounds were isolated from the sponge spongia obligue collected from the South China Sea. Their chemical structures were established by UV, IR, MS, D NMR, D NMR and element
中文: 首次报道从中国南海西沙群岛海绵Spongia obligue中分离得到 个新的含氮生物碱杂环化合物,通过IR,MS,DNMR,D NMR等波谱数据及元素分析确定它们的结构。
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