You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (2S)-1-[4-(1H-indol-3-yl)-2-oxobutanoyl]-4-phenylmethoxypyrrolidine-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H32N2O5
assistant