You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 7-anilino-3-[[4-[[4-[[2,5-dimethyl-4-[[6-sulfo-8-(3-sulfopropoxy)naphthalen-2-yl]diazenyl]phenyl]diazenyl]-5-methyl-2-(3-sulfopropoxy)phenyl]diazenyl]-2,5-dimethylphenyl]diazenyl]-4-hydroxynaphthalene-2-sulfonic acid .
user
C55H53N9O15S4
assistant