You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [4-[(Z)-2-cyclohexa-1,5-dien-1-yl-2-phenylethenyl]cyclohexa-1,5-dien-1-yl]methanimine using the IUPAC nomenclature.
user
C21H21N
assistant