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 N-[(2-fluorophenyl)methyl]-N-methyl-4-oxo-6,7,8,9-tetrahydropyrimido[2,1-b][1,3]benzothiazole-3-carboxamide .
user
C19H18FN3O2S
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