You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 6-(4-cyano-7-methyl-3-oxo-6-pent-2-ynyl-1H-2-benzofuran-5-yl)-4-methylhex-4-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25NO4
assistant