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 3-[(2S)-2-[(4-but-2-ynoxyphenyl)sulfonylamino]-2-carboxyethyl]-1-(pyridin-3-ylmethyl)indole-5-carboxylic acid .
user
C28H25N3O7S
assistant