You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5-tert-butyl-3-chloro-2-prop-2-enoxyphenyl)-(2,7-diphenyl-9H-fluoren-9-yl)-diethylsilane into its molecular formula.
user
C42H43ClOSi
assistant