You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-methoxy-3-[6-(2-piperidin-1-ylpropoxy)-1H-benzimidazol-2-yl]-1H-quinoxalin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27N5O3
assistant