You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R)-1-[4-(6-thiophen-2-yl-3,4-dihydro-1H-isoquinolin-2-yl)pyrimidin-2-yl]ethanol into molecular formula.
user
C19H19N3OS
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