Studies on pharmacokinetics of guanfu base I,a metabolite of guanfu base A / 中国药理学通报

ABSTRACT

Aim To establish an analytical method for determination of guanfu base I (GFI) concentration in plasma and investigate its pharmacokinetics in rats. Methods Rats were given a 20 mg?kg~-1 dose intravenously. Blood samples were collected at various times after iv administration. The plasma concentration of GFI was determined by LC-MS. Pharmacokinetic parameters were calculated by 3p97 program.Results The method was linear in the 0.05～20 mg?L~-1 concentration range (r=~0.999 4 ). The recovery of guanfu base I was more than 80%.The intraday and interday precision, expressed as the relative standard deviation (RSD), was generally good (