You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[(3R,3'R,4'S,5'R)-5'-[2-[benzyl(2-hydroxyethyl)amino]-2-oxoethyl]-4'-[(4-methoxyphenyl)-dimethylsilyl]-3'-methyl-2-oxo-1-phenylspiro[indole-3,2'-oxolane]-5-yl]-4-oxoazetidin-2-yl] acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C43H47N3O8Si
assistant