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 1-(4-hydroxy-1-phenylbutyl)-3-(2-methyl-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-6-yl)urea into molecular formula.
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C18H25N5O2
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