代谢
D5的主要代谢物在给予Fischer (F-344)大鼠口服和静脉注射(14)C-D5后收集的尿液中得到鉴定... D5的代谢物如下:Me(2)Si(OH)(2),MeSi(OH)(3),MeSi(OH)(2)OSi(OH)(3),MeSi(OH)(2)OSi(OH)(2)Me,MeSi(OH)(2)OSi(OH)Me(2),Me(2)Si(OH)OSi(OH)Me(2),Me(2)Si(OH)OSiMe(2)OSi(OH)Me(2),九甲基环戊硅氧烷,以及羟甲基九甲基环戊硅氧烷。尿液中没有检测到D5的母体...某些代谢物如... Me(2)Si(OH)(2) ...清楚地确立了在硅-甲基键上发生去甲基化的现象。线性硅氧烷的代谢物在结构上与环状硅氧烷获得的代谢物不同,除了普遍存在的Me(2)Si(OH)(2)。提出了形成代谢物的机制路径。
Major metabolites of D5 were identified in urine collected from Fischer (F-344) rats administered ... (14)C-D5 orally and via intravenous injection ... The metabolites of D5 are as follows: Me(2)Si(OH)(2), MeSi(OH)(3), MeSi(OH)(2)OSi(OH)(3), MeSi(OH)(2)OSi(OH)(2)Me, MeSi(OH)(2)OSi(OH)Me(2), Me(2)Si(OH)OSi(OH)Me(2), Me(2)Si(OH)OSiMe(2)OSi(OH)Me(2), nonamethylcyclopentasiloxanol, and hydroxymethylnonamethylcyclopentasiloxane. No parent ... D5 was present in urine. The presence of certain metabolites such as ... Me(2)Si(OH)(2) ... clearly established the occurrence of demethylation at the silicon-methyl bonds. Metabolites of the linear siloxane are structurally different from that obtained for cyclic siloxane except for the commonly present Me(2)Si(OH)(2). Mechanistic pathways for the formation of the metabolites were proposed.
来源:Hazardous Substances Data Bank (HSDB)