Δ8,9-Dehydroestrone is the fifth most abundant component in the conjugated equine estrogen preparation Premarin®, representing about 2 to 6% of the total steroids in the tablet. The metabolism of this estrogen has been determined in female beagle dogs after acute peroral administration. 17β-Dihydro-Δ8,9-dehydroestrone(17β-Δ8,9-dehydroestradiol) and 17α-dihydro-Δ8,9dehydroestrone(17α-Δ8,9-dehydroestradiol) have been identified as the major metabolites in plasma and urine. These metabolites, along with the unchanged drug, were isolated and purified by ether extraction and thin-layer chromatography of the urine samples after enzyme hydrolysis. The trimethylsilyl ether derivatives of the isolated metabolites were characterized by comparison of their mass spectra and chromatographic properties with those of synthetic reference standards.
Δ8,9-脱氢
雌酮是共轭马
雌激素制剂普瑞玛琳®中含量第五高的成分,约占片剂中类
固醇总量的2%至6%。在急性经口给药后,雌性小猎犬体内的
雌激素代谢情况已经确定。17β-二氢-Δ8,9-脱氢
雌酮(17β-Δ8,9-脱氢
雌二醇)和17α-二氢-Δ8,9-脱氢
雌酮(17α-Δ8,9-脱氢
雌二醇)已被确定为血浆和尿液中的主要代谢产物。这些代谢产物与未改变