You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (2R)-2-(4-chloro-3-methylphenoxy)-N-[(1R)-1-(2,5-dimethoxyphenyl)ethyl]propanamide is given. What is its corresponding molecular formula?
user
C20H24ClNO4
assistant