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-[3-[(7-chloro-5,8-dioxoquinolin-6-yl)amino]-1-bicyclo[1.1.1]pentanyl]but-2-ynamide is given. What is its corresponding molecular formula?
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C18H14ClN3O3
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