Chemical Name: (R)-2-formamido-3-mercapto-3-methylbutanoic acid
Synonym: (2R,3R,4S,5R)-5-(6-amino-2-(((2R,3R,4S,5R)-5-(6-amino-2-chloro-9H-purin-9-yl)-4-fluoro-2-(hydroxymethyl)tetrahydrofuran-3-yl)oxy)-9H-purin-9-yl)-4-fluoro-2-(hydroxymethyl)tetrahydrofuran-3-ol