You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-amino-7-[(2R,3R,4S,5S)-3-hydroxy-5-(hydroxymethyl)-4-methyloxolan-2-yl]-3H-pyrrolo[2,3-d]pyrimidin-4-one .
user
C12H16N4O4
assistant