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 [(3aS,4S,10aS)-2,6-diamino-10,10-dihydroxy-3a,4,8,9-tetrahydro-1H-pyrrolo[1,2-c]purin-3-ium-4-yl]methylazanium is given. What is its corresponding molecular formula?
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C9H19N7O2+2
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