You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[(2-amino-6-oxo-7,8-dihydro-1H-purin-9-yl)methoxy]-2-hydroxyethoxy]methylphosphonic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C9H16N5O7P
assistant