You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(4-amino-1,3,5-triazin-2-yl)sulfanyl]-N-[4-(3,4-dimethoxyphenyl)-1,3-thiazol-2-yl]butanamide into its molecular formula.
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C18H20N6O3S2
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