You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named [1-[6-chloro-5-(3-methoxyphenyl)sulfanyl-1H-benzimidazol-2-yl]pyrazol-4-yl] hydrogen carbonate is given. What is its corresponding molecular formula?
user
C18H13ClN4O4S
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