代谢
GTS-21经过O-脱甲基化反应生成了化合物,随后这些化合物经历了葡萄糖醛酸化。在大鼠尿液中分离并鉴定出了三种代谢物,分别为4-OH-GTS-21、4-OH-GTS-21葡萄糖醛酸苷和2-OH-GTS-21葡萄糖醛酸苷。主要的尿液代谢物是4-OH-GTS-21葡萄糖醛酸苷和2-OH-GTS-21葡萄糖醛酸苷。用人肝微粒体中的细胞色素P450进行体外化学抑制实验表明,CYP1A2和CYP2E1是主要负责GTS-21的O-脱甲基化的同工酶,CYP3A也有一定的贡献。
GTS-21 was O-demethylated to yield compounds that were then subject to glucuronidation. Three of the metabolites in rat urine were isolated and characterized as 4-OH-GTS-21, 4-OH-GTS-21 glucuronide and 2-OH-GTS-21 glucuronide. The major urinary metabolites were 4-OH-GTS-21 glucuronide and 2-OH-GTS-21 glucuronide. In vitro chemical inhibition of cytochrome P450 in human liver microsomes indicated that CYPIA2 and CYP2E1 were the isoforms primarily responsible for the O-demethylation of GTS-21, with some contribution from CYP3A.
来源:DrugBank