You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,3'R,4'S,5'R)-5'-(2-hydroxyethyl)-5-methoxy-4'-[(4-methoxyphenyl)-dimethylsilyl]-3'-methyl-1-phenylspiro[indole-3,2'-oxolane]-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H35NO5Si
assistant