You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 8-(2-carbazol-9-ylpyrimidin-4-yl)-10,10-dimethyl-3,5,8,15-tetrazatetracyclo[7.7.0.02,7.011,16]hexadeca-1(9),2,4,6,11(16),12,14-heptaene .
user
C30H21N7
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