You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[(2S,4R,5S,6S)-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]-1-[(2S,4S,5S,6S)-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]purin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H24N4O9
assistant