5-Amino-1MQ, short for 5-amino-1-methylquinolinium, is a small, membrane-permeable molecule with the chemical formula C₁₀H₁₁N₂⁺. It functions as a selective inhibitor of the enzyme nicotinamide N-methyltransferase (NNMT), which plays a role in various cellular metabolic pathways.

In biochemical research, 5-Amino-1MQ is studied for its ability to influence nicotinamide adenine dinucleotide (NAD⁺) levels, a coenzyme involved in redox reactions and energy metabolism. By modulating NNMT activity.