You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2,4-dimethyl-1,3-thiazol-5-yl)-[4-[6-(3-methoxyphenyl)pyridazin-3-yl]piperazin-1-yl]methanone into its molecular formula.
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C21H23N5O2S
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