You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-(3-imidazol-1-ylpropyl)-4,7-dimethyl-2-(3-phenylpropyl)purino[7,8-a]imidazole-1,3-dione into its molecular formula.
user
C24H27N7O2
assistant