You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-(2,6-diethylanilino)-1-oxopropan-2-yl]-5-methyl-N-(2-methylphenyl)-4-oxothieno[2,3-d]pyrimidine-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H30N4O3S
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