代谢
基于大鼠药代动力学研究的发现,建议口服给药后吸收的恩扎卡米尼经过广泛的首过肝脏代谢。在大鼠口服恩扎卡米尼(4-MBC)后,血浆和尿液中检测到的代谢物为3-(4-羧基苄基亚肼)樟脑和四种3-(4-羧基苄基亚肼)羟基樟脑的同分异构体,其中羟基位于樟脑环系统中的3-(4-羧基苄基亚肼)-6-羟基樟脑为主要代谢物。然而,在达到峰值浓度后,3-(4-羧基苄基亚肼)-6-羟基樟脑的血液浓度低于检测限。通过细胞色素P450系统介导的羟基化反应,形成3-(4-羟甲基苄基亚肼)樟脑。这个代谢物通过醇脱氢酶和醛脱氢酶的氧化作用进一步氧化为3-(4-羧基苄基亚肼)樟脑,并且可能通过CYP450系统进一步羟基化为3-(4-羧基苄基亚肼)-6-羟基樟脑。
Based on the findings of a rat pharmacokinetic study, it is proposed that absorbed enzacamene following oral administration undergo extensive first-pass hepatic metabolism. Following oral administration of enzacamene (4-MBC) in rats, detected metabolites in the plasma and urine were 3-(4-carboxybenzylidene)camphor and as four isomers of 3-(4-carboxybenzylidene)hydroxycamphor containing the hydroxyl group located in the camphor ring system with 3-(4-carboxybenzylidene)-6-hydroxycamphor as the major metabolite. However the blood concentrations of 3-(4-carboxybenzylidene)-6-hydroxycamphor were below the limit of detection following peak concentration. Via hydroxylation mediated by cytochrome P450 system, 3-(4-hydroxymethylbenzylidene)camphor is formed. This metabolite is further oxidized to 3-(4-carboxybenzylidene)camphor via oxidation of alcohol dehydrogenase and aldehyde dehydrogenase, and may be further hydroxylated to form 3-(4-carboxybenzylidene)-6-hydroxycamphor mediated by CYP450 system.
来源:DrugBank