You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 5-acetyl-2-[[1-(4-ethylphenyl)-4-oxopyridazine-3-carbonyl]amino]-4-methylthiophene-3-carboxylate into its molecular formula.
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C23H23N3O5S
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