117641-39-1

(1S,2R,3S,5R)-2-[(Phenylmethoxy)methyl]-6-oxabicyclo[3.1.0]hexan-3-ol, is an impurity of Entecavir (E558900), an oral antiviral drug used in the treatment of hepatitis B infection. A guanine analogue that inhhibits all three steps in the viral replication process.