You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(3-methoxypropyl)-N-[3-methyl-4-(tetrazol-1-yl)phenyl]-4-oxo-2-sulfanylidene-1H-quinazoline-7-carboxamide into its molecular formula.
user
C21H21N7O3S
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