You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[N,N-diethyl-N'-[(4-nitrophenyl)methyl]carbamimidoyl]benzenecarbothioic S-acid is given. What is its corresponding molecular formula?
user
C19H21N3O3S
assistant