You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S,3S)-2-[(4-methoxyphenyl)methylsulfanyl]-6-oxo-6-phenylmethoxy-3-(phenylmethoxycarbonylamino)hexanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C29H31NO7S
assistant