You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2S,3aR)-1-acetyl-7-chloro-2-(4-methoxyphenyl)spiro[2,3a-dihydro-1H-pyrrolo[1,2-a]quinoline-3,2'-indene]-1',3'-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H22ClNO4
assistant