You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(Z)-N-(2-carboxy-4-methylanilino)-C-(2-sulfophenyl)carbonimidoyl]diazenyl]-4,6-bis(trioxidanylsulfanyl)benzoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H18N4O13S3
assistant