You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-chloro-4-(3,4-dihydro-1H-isoquinolin-2-yl)-5-(4-ethylphenyl)-6-methylthieno[2,3-d]pyrimidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H22ClN3S
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