You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[[N'-methyl-N-(2-thiophen-2-ylpropyl)carbamimidoyl]amino]ethyl]-4-(trifluoromethyl)benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23F3N4OS
assistant