You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-amino-2-methyl-N-[1-[1-[4-(2-methylsulfinylethylamino)-4-oxobutyl]tetrazol-5-yl]-2-phenylmethoxyethyl]propanamide into molecular formula.
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C21H33N7O4S
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