You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-methyl-5-phenyl-2,7,9-triaza-1-azonia-6-azanidatricyclo[8.4.0.03,8]tetradeca-1(14),2,4,8,10,12-hexaene by IUPAC nomenclature, provide its molecular formula.
user
C16H13N5
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