You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-(2,2-dimethylpropanoyl)-N-(5-propyl-1,3,4-thiadiazol-2-yl)piperidine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C16H26N4O2S
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