You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[(2S,3R,4S,5R)-5-(chloromethyl)-3,4-dihydroxyoxolan-2-yl]-1H-purin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C10H11ClN4O4
assistant