You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (2R)-2-[[2-[N-(benzenesulfonyl)anilino]acetyl]-[(2-chlorophenyl)methyl]amino]-N-ethylbutanamide using the IUPAC nomenclature.
user
C27H30ClN3O4S
assistant