demethylated to cephaeline and 9-0-demethylemetine, and may be conjugated to glucuronides afterwards. Urine, feces and bile were collected from rats within 48 hours following the administration of ipecac syrup containing tritium (3H)--labeled cephaeline or emetine. Metabolites were separated and quantified by thin layer chromatography (TLC) or high-performance liquid chromatography (HPLC). Biliary and urinary
在大鼠中研究了吐根糖浆的主要活性成分头孢
喹啉和
依米丁的代谢。Cephaeline-6'-O-glucuronide 被发现是 cephaeline 的胆汁代谢物。观察到 Cephaeline (6'-O-demethylemetine) 和 9-O-demethylemetine 是 emetine 的酶
水解胆汁代谢物。Cephaeline 与
葡糖苷酸结合,而 emetine 去甲基化为 cephaeline 和 9-0-demethylemetine,之后可能与
葡糖苷酸结合。在给予含有氚 (3H) 的吐根糖浆后 48 小时内,从大鼠身上收集尿液、粪便和胆汁——标记的头孢烯或
依米丁。通过薄层色谱法 (TLC) 或高效
液相色谱法 (HPLC) 分离和量化代谢物。3H-头孢烯的胆汁和尿排泄率为 57。分别为剂量的 5% 和 16.5%。Cephaeline-6'-O-glucuronide 占胆道放射性的