You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1'S,2'S,3R,3'aR)-1'-acetyl-7'-methyl-2'-(4-propylbenzoyl)spiro[1H-indole-3,3'-2,3a-dihydro-1H-pyrrolo[1,2-a]quinoline]-2-one by IUPAC nomenclature, provide its molecular formula.
user
C32H30N2O3
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