You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[3-[2-(dimethylamino)ethylcarbamoyl]phenyl]methyl]-2-methyl-2,3-dihydroindole-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H28N4O2
assistant