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 7-methyl-2-[methyl-[(2-piperidin-1-ylphenyl)methyl]amino]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-5-one .
user
C19H23N5OS
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