You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule tert-butyl (2S)-2-[[(1S)-1-[5-[1-(5-bromopentyl)-2-oxoquinolin-6-yl]-1,3-oxazol-2-yl]-7-oxononyl]carbamoyl]-6-azaspiro[2.5]octane-6-carboxylate into molecular formula.
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C39H53BrN4O6
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