You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1E,6Z,12Z,18Z)-10-carbazol-9-yl-3,17,20-triazapentacyclo[17.4.0.02,6.07,12.013,18]tricosa-1,4,6,8,10,12,14,16,18,20,22-undecaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H20N4
assistant