You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[6-amino-8-oxo-7-(4-phenoxyphenyl)purin-9-yl]piperidin-1-yl]-N-propan-2-ylprop-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H31N7O3
assistant