You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[1-(4-methylsulfonylphenyl)ethyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-amine .
user
C19H21N3O2S2
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