You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[2-[(3R,4R)-3-(aminomethyl)-4-phenylpyrrolidin-1-yl]propanoyl]-1,3-dihydroquinoxalin-2-one into molecular formula.
user
C22H26N4O2
assistant