Furosemide, a pharmaceutical prescribed for the treatment of edema and hypertension, is a known contaminant of water. In this study, chemoselective anodicoxidation was implemented to assist in the identification and the preparation of furosemide transformation products (TPs), i.e., compounds deriving from furosemide and likely to appear in the environment. An aniline and a pyridinium are proposed as plausible