You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-phenyl-14-(3-phenylphenyl)-9-(4-phenylphenyl)-9,14-diazapentacyclo[11.7.0.02,10.03,8.015,20]icosa-1(13),2(10),3(8),4,6,11,15,17,19-nonaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C48H32N2
assistant