You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[5-(1,2,3,4-tetrahydronaphthalen-1-yl)-1,3,4-thiadiazol-2-yl]-3,6-dihydro-2H-pyran-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H19N3O2S
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