You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1,3-benzothiazol-2-ylmethyl)-1-methyl-3-[5-(2-oxopyrrolidin-1-yl)pyridin-2-yl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19N5O2S
assistant