代谢
(14)C-Norgestrel 给七名受试者服用后,5天内尿液中排出了剂量的43%... 酶水解仅释放了尿液中放射性活度的32%,另外25%以硫酸盐结合物的形式排出。尿液中排出的代谢物比服用相关化合物如norethisterone或lynestrenol后的代谢物极性要小得多。从尿液中分离出了四氢诺孕酮的3alphaOH,5beta和3betaOH,5beta异构体(13beta-ethyl-17alpha-ethynyl-5beta-gonane-3alpha,17beta-二醇),并通过质谱、薄层色谱和气液色谱进行了鉴定。血浆中的放射性活度下降速度比服用norethisterone和lynestrenol后要快。大约2%的服用剂量转化为了酸性化合物。无论是口服还是静脉给药,norgestrel的放射性活度排出速率或代谢物似乎没有明显差异。
(14)C-Norgestrel was administered to seven human subjects and 43% of dose was excreted in the urine within 5 days ... Enzymic hydrolysis released only 32% of the urinary radioactivity and a further 25% was excreted as sulphate conjugates. The metabolites excreted in the urine were much less polar than those following the administration of the related compounds, norethisterone or lynestrenol. The 3alphaOH,5beta and 3betaOH,5beta isomers of the tetrahydronorgestrel (13beta-ethyl-17alpha-ethynyl-5 beta-gonane-3alpha,17beta-diol) were isolated from urine and identified by mass spectrometry and thin-layer and gas-liquid chromatography. Plasma radioactivity decreased more rapidly than after the administration of norethisterone and lynestrenol. About 2% of the administered dose was converted to acidic compounds. There was no apparent difference in the rate of excretion of radioactivity or in the metabolites after either oral or intravenous administration of norgestrel.
来源:Hazardous Substances Data Bank (HSDB)