You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(9-oxa-14-azapentacyclo[11.7.0.02,10.03,8.015,20]icosa-1(13),2(10),3,5,7,11,15,17,19-nonaen-14-yl)-2-[3-(9-oxa-14-azapentacyclo[11.7.0.02,10.03,8.015,20]icosa-1(13),2(10),3,5,7,11,15,17,19-nonaen-14-yl)phenyl]benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H27N3O2
assistant