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 4-[2-[4-(2-methoxyphenyl)piperazin-1-yl]-2-oxoethyl]-5-methyl-2-(2-methylphenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-one is given. What is its corresponding molecular formula?
user
C26H28N6O3
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