You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[4-[2-(6-amino-2-butoxy-8-oxo-7H-purin-9-yl)ethyl]piperazin-1-yl]-2-methylbutan-2-yl]-5-propoxynaphthalene-1,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C33H45N7O5
assistant