You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(4R,4aR,6R,7R,11R,12aR)-11-[tert-butyl(diphenyl)silyl]oxy-7-hydroxy-1-methyl-4-propan-2-yl-3,4,4a,5,6,7,10,11,12,12a-decahydrobenzo[10]annulen-6-yl] 2,2-dimethylpropanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C39H56O4Si
assistant