You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule methyl 3-methyl-1-[2-(4-methylphenyl)sulfinyl-2-oxoethyl]pyrrolo[2,3-b]pyridine-5-carboxylate into molecular formula.
user
C19H18N2O4S
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