Substances: 4-Hydroxy Diclofenac (KGVXVPRLBMWZLG-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) AMDOPH (IRTZMJWVZQYURE-UHFFFAOYSA-N) Keywords: high resolution mass spectrometry monitoring