You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 9-N,9-N,23-N,23-N-tetraphenyl-14-oxa-28-thiaheptacyclo[15.11.0.03,15.04,13.06,11.018,27.020,25]octacosa-1,3(15),4(13),5,7,9,11,16,18(27),19,21,23,25-tridecaene-9,23-diamine .
user
C50H32N2OS
assistant