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 N-dibenzothiophen-4-yl-N,12-bis(4-phenylphenyl)-10,20-dioxapentacyclo[11.7.0.03,11.04,9.014,19]icosa-1(13),2,4(9),5,7,11,14,16,18-nonaen-8-amine .
user
C54H33NO2S
assistant