Nicotinamide N-oxide (CAS No 1986-81-8) is a compound utilized in biomedical research particularly in the fields of enzymology and drug development It originates from the oxidation of nicotinamide a form of vitamin B3 The compound primarily targets pathways involved in cellular metabolism and oxidative stress responses Its mechanism of action includes modulating the activity of enzymes such as poly(ADP-ribose) polymerases impacting DNA repair processes and cellular energy homeostasis In vitro it exhibits activity in the nanomolar to low micromolar range making it suitable for detailed biochemical studies Typical applications include experiments in cell models and animal studies to investigate metabolic pathways assess oxidative stress and screen for potential drug candidates Experimental concentrations typically depend on the specific research design allowing for flexibility in various investigative contexts