You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chlorophenyl)-N-[2-(cyclopentylamino)-1-(3,4-dimethoxyphenyl)-2-oxoethyl]furan-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27ClN2O5
assistant