You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[8-[(6-chloro-2,3-dihydro-1H-pyrrolo[2,1-b]quinazolin-9-ylidene)amino]octyl]-5-(dithiolan-3-yl)pentanamide by IUPAC nomenclature, provide its molecular formula.
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C27H39ClN4OS2
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