You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-(4-chlorophenyl)-5-methyl-7-(3-methylthiophen-2-yl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide into molecular formula.
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C18H16ClN5OS
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