You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(1R)-1-amino-2-methylpropyl]-5-benzyl-3-methyl-[1,2]thiazolo[5,4-d]pyrimidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
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C17H20N4OS
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