You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (13S)-12-(2,5-dimethylphenyl)-6,13,14-trimethyl-8-oxa-5,12,14-triazatetracyclo[7.7.0.02,7.011,15]hexadeca-1(16),2(7),3,5,9,11(15)-hexaene by IUPAC nomenclature, provide its molecular formula.
user
C23H23N3O
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