You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3,4-dihydro-2H-chromen-4-yl)-2-[2-(2,5-dimethoxyphenyl)pyrrolidin-1-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C23H28N2O4
assistant