You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 8-[6'-[4-cyclohexa-1,5-dien-1-yl-6-[1-(6-ethenylcyclohexa-2,4-dien-1-yl)ethenyl]pyrimidin-2-yl]spiro[fluorene-9,9'-thioxanthene]-3'-yl]quinoline into its molecular formula.
user
C54H39N3S
assistant