You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-(3-hydroxypropylamino)-3-[(4-methylphenyl)methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H25N3O2S
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