You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7-benzyl-8-hydroxy-4-methylsulfanyl-9-propan-2-yl-2-propan-2-yliminopyrimido[1,2-a][1,3,5]triazin-6-one into its molecular formula.
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C20H25N5O2S
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