You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[(3-methoxyphenyl)methyl]-2-methyl-3-[[4-[methyl(propan-2-yl)sulfamoyl]phenyl]methyl]guanidine into molecular formula.
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C21H30N4O3S
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