You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-(2-methyl-1H-indol-3-yl)-1,3-thiazol-2-yl]-3-(2-oxopyrrolidin-1-yl)benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H20N4O2S
assistant