You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-[5-(3-chlorophenyl)furan-2-yl]-3-methylsulfanyl-7-propanoyl-2,6-dihydro-[1,2,4]triazino[1,6-c]quinazolin-5-ium-1-one by IUPAC nomenclature, provide its molecular formula.
user
C24H20ClN4O3S+
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