You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-butoxy-6-(furan-2-yl)-2-(2-methylpropyl)-7-oxo-6,8-dihydroisoquinolin-3-yl]-methylcarbamic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H30N2O5
assistant