(2R,3R,4R,5R)-5-(6-Benzamido-9H-purin-9-yl)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-4-fluorotetrahydrofuran-3-yl (2-cyanoethyl) diisopropylphosphoramidite is an adenosine derivative used in the preparation of modified nucleotides to improve metabolic stability and ellicit gene silencing, and in the synthesis of microRNA inhibitors.