You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 5-[4-[4-(2-methylpropylamino)imidazo[1,2-a]quinoxalin-1-yl]phenyl]-5-oxopentanamide ?
user
C25H27N5O2
assistant