You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(4-fluorophenyl)methyl-[(3-methylthiophen-2-yl)methyl]amino]-2-oxoethyl]-3-nitro-N-propan-2-ylbenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H26FN3O4S
assistant