You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[2-(1,3-benzodioxol-5-yl)-7-oxo-6H-pyrazolo[1,5-a][1,3,5]triazin-4-yl]sulfanyl]-N-phenylacetamide into molecular formula.
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C20H15N5O4S
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