You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-chlorophenyl)-4-methyl-N-[4-oxo-4-(3-pyrrolidin-1-ylanilino)butan-2-yl]-1,3-thiazole-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27ClN4O2S
assistant