The metabolic fate of 2α-cyano-4α, 5α-epoxy-17β-hydroxyandrostan-3-one (trilostane) in rats was studied. Five metabolites were isolated by successive column chromatography on XAD-2, LH-20, and silica gel, and they were characterized by gas chromatographymass spectrometry, nuclear magnetic resonance spectroscopy, and infrared spectroscopy. Unchanged trilostane and three metabolites, 2α-cyano-4α, 5α-epoxyandrostane-3, 17-dione (M-1), 2α-cyano-3α, 16α-dihydroxy-4α, 5α-epoxyandrostan-17-one (M-2), and 2α-cyano-4α, 5α-epoxyandrostane-3α, 16α, 17β-triol (M-3) were identified by comparison with authentic samples. Structures were tentatively assigned to the other two metabolites (M-4 and M-5). In rats given trilostane orally, unconjugated metabolites were predominantly excreted in the urine, whereas conjugated ones were excreted in the bile. On the basis of the data on biliary and urinary excretions and plasma level, the metabolic pathway of trilostane is proposed.
研究人员对大鼠体内2α-
氰基-4α,5α-环氧-17β-羟基
雄甾烷-3-酮(三洛斯坦)的代谢过程进行了研究。研究人员通过在XAD-2、LH-20和
硅胶上连续柱色谱法分离出五种代谢产物,并利用气相色谱质谱法、核磁共振波谱法和红外光谱法对其进行了定性。通过对比真品样品,研究人员确定了未改变的三洛斯坦和三种代谢产物,即2α-
氰基-4α,5α-环氧
雄甾烷-3,17-二酮(M-1)、2α-
氰基-3α,16α-二羟基-4α,5α-环氧
雄甾烷-17-酮(M-2)和2α-
氰基-4α,5α-环氧
雄甾烷-3α,16α,17β-三醇(M-3)。研究人员还初步确定了另外两种代谢产物(
M-4和M-5)的结构。在口服三洛斯坦的大鼠体内,未结合的代谢产物主要通过尿液排出,而结合的代谢产物则通过胆汁排出。研究人员根据胆汁和尿液排泄以及血浆
水平数据,提出了三洛斯坦的代谢途径