You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[(1R,3R,3aR,6aS)-5'-chloro-1-(1H-indol-3-ylmethyl)-2',4,6-trioxospiro[1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3,3'-1H-indole]-5-yl]phenyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H24ClN5O4
assistant