You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(dimethylamino)methyl]-N-(4-ethoxyphenyl)-5-methyl-4-oxo-3H-thieno[2,3-d]pyrimidine-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H22N4O3S
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