You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule tert-butyl (5S)-11-oxo-2,4,10-triazatetracyclo[10.4.0.02,6.07,10]hexadeca-1(16),3,12,14-tetraene-5-carboxylate into molecular formula.
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C18H21N3O3
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