You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E,4R)-4-[(1R,3aS,4E,7aR)-4-[(2Z)-2-[(3S,5R)-3,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylidenecyclohexylidene]ethylidene]-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-1-yl]-1-(1-ethylcyclopropyl)pent-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C41H70O3Si2
assistant