You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(5-methylpyridin-2-yl)-2-[2-oxo-2-[4-(thiophen-2-ylmethyl)piperazin-1-yl]ethyl]sulfanylquinazolin-4-one into its molecular formula.
user
C25H25N5O2S2
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