You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-(3,4-dihydro-2H-quinolin-1-yl)-2-[[5-[(3-methylphenoxy)methyl]-1,3,4-oxadiazol-2-yl]sulfanyl]ethanone by IUPAC nomenclature, provide its molecular formula.
user
C21H21N3O3S
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