You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-amino-4-[4-[ethyl-[2-(4-methylsulfonylphenyl)acetyl]amino]piperidin-1-yl]-2-phenylbutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H43N3O5S
assistant