Objective: To investigate the metabolites in rat urine after orally administrating gossypetin-8-O-beta-D-glucuronide.
Method: Gossypetin-8-O-beta-D-glucuronide was administrated orally at the dose of 250 mg x kg(-1) to healthy rats, then the urine was collected, pre-treated appropriately and detected by HPLC-DAD-MS(n).
Result: In the rat urine, gossypetin-8-O-beta-D-glucuronide, along with 6 metabolites, were detected, and their structures were elucidated on the basis of reference standards, UV and MS(n) spectra. The metabolic pathways of gossypetin-8-O-beta-D-glucuronide included mainly deglycosylation, glucuronidation and methylation.
Conclusion: A rapid and sensitive method for the analysis of metabolites in rat urine after orally administrating gossypetin-8-O-beta-D-glucuronide was established and this will be useful for the further metabolism study of gossypetin-8-O-beta-D-glucuronide.