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.

N-Nitrosomorpholine is a nitrosamine that is sensitive to light. N-nitrosomorpholine is a strong animal carcinogen.

The heat shock protein 90 (Hsp90) is a molecular chaperone that activates and maintains the biological functioning of several client proteins, many of which are associated with oncogenic signaling pathways.