RESUMO
Aim To analyze the main components of effective fractions of Inula cappa in rat plasma with UHPLC/Q-TOF/MS technology and serum pharmacochemistry theory.Methods After gavage administration with Inula cappa extracts,blood was collected from abdominal aorta,and the protein in plasma sample was precipitated by methanol.Eclipse Plus C18 RRHD (2.1 mm × 100 mm,1.8 μm) was used,with 0.1％ formic acid agueous solution (A)-0.1％ formic acid and acetonitrile (B) as the mobile phase for gradient elution,and the flow rate was 0.3 mL ·min-1 Detected at negative ion mode,and with the help of Metabolite Tools software from Bruker Corporation,components in plasma were defined.Results A total of 16 compounds were identified,including 9 prototypes and 7 metabolites.Main metabolites were isomerization,methylation,glucuronidation and recombination of caffeoylquinic acid.Conclusions Therefore,our study has comprehensively expounded Inula cappa extracts' constituents migrating to rat plasma,and provided a reference for further studies for in vivo metabolic process and effective material base of Inula cappa.