You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[[5-chloro-3-formyl-1-(4-methylphenyl)sulfonylpyrrolo[2,3-b]pyridin-4-yl]methylamino]-3-methylbutanoate ?
user
C21H21ClN3O5S-
assistant