You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(4-aminobutyl)-1'-(1H-indol-3-ylmethyl)-3'-methyl-7-phenoxyspiro[2,3-dihydroquinoline-4,5'-imidazolidine]-2',4'-dione .
user
C31H33N5O3
assistant