Acetoacetic acid sodium salt is a metabolite of non-esterified fatty acids, involved in the development of human diabetes.

(D-Thr6,D-Trp8·9,L-alaninol15)-Galanin (1-15)

2′,2′-Difluorodeoxyuridine (dFdU), the major metabolite of Gemcitabine, exhibits anticancer and antitumor activities, shows radiosensitization under hypoxic conditions, and can be used to study pancreatic cancer.