You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(6-ethyl-4-oxothieno[2,3-d]pyrimidin-3-yl)-N-[(Z)-[4-[(4-methylphenyl)methoxy]phenyl]methylideneamino]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C25H24N4O3S
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