You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl 10-methylspiro[8-oxa-2,5-diazatricyclo[10.4.0.02,6]hexadeca-1(16),3,5,12,14-pentaene-7,4'-piperidine]-1'-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C23H31N3O3
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