You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-N-butyl-2-[(3-chlorophenyl)methyl-[2-(2,4,5-trichloro-N-methylsulfonylanilino)acetyl]amino]-3-phenylpropanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H31Cl4N3O4S
assistant