You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-N-(2-cyanoethyl)-2-[3-(2,5-dimethylphenyl)-4-oxoquinazolin-2-yl]sulfanyl-N-methylpropanamide into molecular formula.
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C23H24N4O2S
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