You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[[4-amino-5-[4-(difluoromethoxy)phenyl]-1,2,4-triazol-3-yl]sulfanylmethyl]pyrido[1,2-a]pyrimidin-4-one is given. What is its corresponding molecular formula?
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C18H14F2N6O2S
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