You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1-tert-butylpyrazol-4-yl)-3,5-dimethyl-4-oxothieno[2,3-d]pyrimidine-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H19N5O2S
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