You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[5-(2-fluorophenyl)-1-methyl-2-oxo-3H-1,4-benzodiazepin-7-yl]-1,3-thiazolidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19FN4O2S
assistant