Description General description D-(+)-Neopterin is a pteridine derivative, naturally found in Dictyostelium discoideum. It is found in significant amounts in the urine of cancer patients. Application D-(+)-Neopterin has been used as a NADPH oxidase inhibitor while assessing the ability of NADPH oxidases in breast cancer cells to produce reactive oxygen species (ROS). [NADPH= nicotinamide adenine dinucleotide phosphate] Packaging 10, 25, 100 mg in poly bottle Biochem/physiol Actions Pterin cofactor; precursor of BH4 (tetrahydrobiopterin).