Studies on Analgesic Agents. XIII. Metabolic Fate of 1-Butyry1-4-cinnamylpiperazine Hydrochloride (BCP-HCl) in Rats
作者:HIROSHI TERAYAMA、TAKESHI NARUKE、SAKURO KASAI、MAKOTO NUMATA、HISAO NAKAYAMA、TOMOKO SAITO、TSUTOMU IRIKURA
DOI:10.1248/cpb.21.12
日期:——
The metabolic fate of a new analgesic agent, 1-n-butyryl-4-cinnamylpiperazine hydrochloride (BCP-HCl) in the rat was investigated in vivo and in vitro. The following four urinary metabolites were detected in addition to the unchanged drug by both the thin-layer (TLC) and gas-liquid chromatography (GLC); 1-n-butyrylpiperazine (I), 1-n-butyry1-4-(4'-hydroxycinnamyl) piperazine (III), 1-(4'-hydroxycinnamyl)-piperazine (IV) and 1-cinnamylpiperazine (V). These were isolated and identified physicochemically (ultraviolet, infrared and mass spectrometry and mixed melting point test). In addition to the above metabolites, piperazine hexahydrate (II) and two unidentified products, UK-1 and UK-2 were detected in the urine by the TLC but not by the GLC. In the bile BCP, I, III, and IV were detected in addition to the glucuronide and sulfate conjugates of III and IV. One unknown metabolite corresponding to the urinary UK-1 was also detected by the TLC of the biliary metabolites hydrolyzed with β-glucuronidase or arylsulfatase. In vitro incubation of BCP-HCl with the post-mitochondrial fraction of the rat liver resulted in the formation of the four metabolites, I, III, IV and V.
研究人员对一种新型镇痛剂--1-正丁酰基-4-肉桂基哌嗪盐酸盐(BCP-HCl)在大鼠体内和体外的代谢去向进行了调查。通过薄层色谱法(TLC)和气液色谱法(GLC),除了未改变的药物外,还检测到了以下四种尿液代谢物:1-正丁酰基哌嗪(I)、1-正丁酰基1-4-(4'-羟基肉桂酰基)哌嗪(III)、1-(4'-羟基肉桂酰基)哌嗪(IV)和 1-肉桂酰基哌嗪(V)。对这些代谢物进行了分离和理化鉴定(紫外线、红外线和质谱分析以及混合熔点测试)。除上述代谢物外,还在尿液中通过色谱法检测到六水合哌嗪(II)和两种不明产物 UK-1 和 UK-2,但没有通过气相色谱法检测到。在胆汁中检测到 BCP、I、III 和 IV,此外还检测到 III 和 IV 的葡萄糖醛酸和硫酸盐共轭物。用 β-葡萄糖醛酸酶或芳基硫酸酯酶水解的胆汁代谢物的 TLC 也检测到了与尿液中的 UK-1 相对应的一种未知代谢物。BCP-HCl 与大鼠肝脏的线粒体后馏分体外培养可形成四种代谢物 I、III、IV 和 V。