You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4b,8a,9,9a-tetrahydro-4aH-fluoren-9-yl-dimethyl-(2-methyl-3-propyl-2,3,3a,7a-tetrahydro-1H-inden-1-yl)silane .
user
C28H38Si
assistant