You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 15-(9,9-dimethylfluoren-2-yl)-3,4-dimethyl-5-(4-naphthalen-2-ylnaphthalen-1-yl)-5-azapentacyclo[11.8.0.02,6.07,12.016,21]henicosa-1(13),2(6),3,7,9,11,14,16,18,20-decaene ?
user
C57H41N
assistant