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 (2R)-3-cyclopropyl-2-(4-hydroxy-5-methoxy-2-nitrophenyl)-1,2-dihydroquinazolin-4-one is given. What is its corresponding molecular formula?
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C18H17N3O5
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