You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-[[4-[2-[4-[bis(2,3,4,5,6-pentachlorophenyl)methyl]-2,3,5,6-tetrachlorophenyl]ethyl]-2,3,5,6-tetrachlorocyclohexa-2,5-dien-1-ylidene]-(2,3,4,5,6-pentachlorophenyl)methyl]-2,3,4,5,6-pentachlorobenzene .
user
C40H4Cl28-2
assistant