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 19-naphtho[2,1-b][1]benzothiol-9-yl-21-(4-phenylbenzo[h]quinazolin-2-yl)-21-azapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(14),2,4,6,8,10,12,15(20),16,18-decaene .
user
C54H31N3S
assistant