You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(2R,4aS,8aS)-1,2,3,4,4a,5,6,7,8,8a-decahydronaphthalen-2-yl]-2-(3-benzyl-7-ethyl-2,6-dioxopurin-1-yl)acetamide into its molecular formula.
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C26H33N5O3
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