You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 1-[(2R)-3-cyclopentyliminospiro[1,4-dihydroquinoxaline-2,3'-piperidine]-1'-yl]-2-(4-methoxyphenoxy)ethanone ?
user
C26H32N4O3
assistant