You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(1,1-diphenylpropan-2-yl)-4-methoxy-2-(methoxymethyl)-5-methylthieno[2,3-d]pyrimidine-6-carboxamide into its molecular formula.
user
C26H27N3O3S
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