This Application Note describes the seamless integration of a high sensitivity Agilent LC/Q-TOF instrument with software tools (Mass MetaSite software) for the identifi cation of drug metabolites. Mass MetaSite can predict metabolic transformations, estimate the primary site of metabolism, and assign the structures of metabolites from accurate mass MS/MS data. The workfl ow is demonstrated by predicting and identifying primary metabolites from rat hepatocyte incubation of warfarin for 24 hours. Agilent 6545 四極桿飛行時(shí)間液質(zhì)聯(lián)用系統(tǒng)