You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
23-[3-(9,9-dimethylfluoren-4-yl)quinoxalin-2-yl]-23-azahexacyclo[12.7.1.16,9.02,7.08,13.018,22]tricosa-1(21),2(7),3,5,8(13),9,11,14,16,18(22),19-undecaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C45H29N3
assistant