You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[(2S)-1-(3,5-dichlorophenyl)sulfonylpyrrolidine-2-carbonyl]amino]-3-pyridin-3-ylpropanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19Cl2N3O5S
assistant