You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R)-1'-[5-(2-amino-3-chloropyridin-4-yl)sulfanyl-3H-imidazo[4,5-b]pyrazin-2-yl]-6-isocyanospiro[1,3-dihydroindene-2,4'-piperidine]-1-amine by IUPAC nomenclature, provide its molecular formula.
user
C24H22ClN9S
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