You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-chloro-2-methylphenyl)-2-(3,4-dimethoxyphenyl)-4-hydroxy-3-(thiophene-2-carbonyl)-2H-pyrrol-5-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H20ClNO5S
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