You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[(4-but-2-ynoxyphenyl)sulfonylamino]-N-hydroxy-3-[(4-methoxyphenyl)methylsulfanyl]propanamide .
user
C21H24N2O6S2
assistant