You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S,3'S,4'R,5'S)-5'-[2-[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]-2-oxoethyl]-4'-[(4-methoxyphenyl)-dimethylsilyl]-3'-methyl-5-nitro-1-[[4-(3-oxo-1,4-benzoxazin-4-yl)phenyl]methyl]spiro[indole-3,2'-oxolane]-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C43H46N4O9Si
assistant