You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5,6-dimethyl-9-[[4-[methyl(pyridin-3-ylmethyl)amino]quinazolin-2-yl]methyl]-9,12-diaza-5-azoniatricyclo[9.4.0.03,8]pentadeca-1(11),5,7,12,14-pentaen-10-one by IUPAC nomenclature, provide its molecular formula.
user
C30H30N7O+
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