You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethoxy-[4-[8-[2-(2-methoxyphenyl)ethyl]-2,6-dioxo-1-prop-2-ynyl-7H-purin-3-yl]butyl]phosphinic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H29N4O6P
assistant