What is 2-Amino-6-(1,2,3-trihydroxypropyl)-4(3H)-pteridinone?
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A pteridine derivative present in body fluids; elevated levels result from immune system activation, malignant disease, allograft rejection, and viral infections. (From Stedman, 26th ed) Neopterin also serves as a precursor in the biosynthesis of biopterin.