(1R,2S,3S,5R)-3-(6-Amino-9H-purin-9-yl)-4,4-difluoro-5-(hydroxymethyl)cyclopentane-1,2-diol

This compound is a fluorinated derivative of adenosine, specifically designed as an impurity reference standard for quality control in pharmaceutical manufacturing. It is characterized by a difluorinated cyclopentane core with hydroxyl and aminopurine substituents, reflecting its structural relation to adenosine.