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 N'-[[(4R,6R,6aR)-4-(6-aminopurin-9-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]methyl]-N-(6-tert-butyl-1H-benzimidazol-2-yl)-N'-propan-2-ylbutane-1,4-diamine is given. What is its corresponding molecular formula?
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C31H45N9O3
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