2-amino-9-[(1,1,2,3,3-pentadeuterio-1,3-dihydroxypropan-2-yl)oxymethyl]-1H-purin-6-one

This compound is a deuterium-labeled derivative of a guanine nucleoside analog, specifically a pentadeuterated form where five hydrogen atoms are replaced with deuterium. It is primarily used as a research reference standard in analytical and biochemical studies, providing a stable isotope-labeled internal standard for quantification.