Pimonidazole hydrochloride accumulates in hypoxic cells via covalent binding with macromolecules or by forming reductive metabolites after the reduction of its nitro group.

1-Methylhydantoin is a small molecular weight polar substance the product of degradation of creatinine by bacteria. In mammals the metabolism of 1-methylhydantoin occurs via 5-hydroxy-1-methylhydantoin. In a reported human case 1-Methylhydantoin was found as an unexpected metabolite of the intelligence-affecting substance dupracetam.

Valomaciclovir stearate is a DNA polymerase inhibitor. Valomaciclovir stearate is an orally available drug with broad-spectrum antiviral activity against a variety of important herpesviruses, including Epstein-Barr virus, or EBV (the first virus to be directly associated with human cancer), varicella zoster virus, or herpes zoster (cause of shingles), and herpes simplex virus 1 and 2.