You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[[5-[(1S)-1-(4-ethylphenoxy)ethyl]-4-methyl-1,2,4-triazol-3-yl]sulfanyl]-N-(1,3-thiazol-2-yl)acetamide into its molecular formula.
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C18H21N5O2S2
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