You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4,5-dimethyl-2-[6-[[(1R)-1-(2-methyl-1,3-thiazol-4-yl)ethyl]amino]pyridin-3-yl]-1H-pyrimidin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H19N5OS
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