The ratio of 2-VPMA, 3-VPMA, and 4-VPMA was approximately 2:1:6. In model reactions of styrene 3,4-oxide (3,4-STO) with N-acetylcysteine in aqueous solutions and of its methyl ester in methanol, 4-vinylphenol was always the main product, while 3-vinylphenol has never been detected. No mercapturic acid was found in the reaction of 3,4-STO with N-acetylcysteine in aqueous solution at pH 7.4 or 9.7, but
分析了暴露于
苯乙烯蒸气(600和1200 mg / m 3,6 h)的小鼠尿液中
苯乙烯的环氧化代谢产物。为方便识别尿液中的代谢物,制备了以下潜在的代谢物:2-,3-和4-
乙烯基苯酚(2-,3-和4-VP),4-
乙烯基邻苯二酚和2-,3-,和4-
乙烯基苯基巯基酸(2-,3-和4-V
PMA)。为了分析
乙烯酚,将β-
葡萄糖醛酸苷酶处理过的尿液萃取并用
乙酸酐/
三乙胺衍生化,然后注入GC / MS。使用真实标准品,在暴露的尿液中发现了3种异构体2-,3-和4-VP。此外,通过LC-ESI-MS 2鉴定了三种新的次要尿代谢产物芳基巯基酸2-,3-和4-V
PMA。通过与真实标准进行比较。最丰富的异构体4-V
PMA的排泄量为535±47 nmol / kg和984±78 nmol / kg,分别代表600和1200 mg / m 3暴露
水平的吸收剂量的0.047%和0.043%,分别。2-V
PMA,3-V