You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[5-[1-(dimethylsulfamoyl)pyrrolidin-2-yl]pyrazin-2-yl]pyridine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H19N5O4S
assistant