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 trisodium;6-[[2,5-dimethoxy-4-(2-oxidoperoxysulfanyloxyethylsulfonyl)phenyl]diazenyl]-5-hydroxy-7-oxidoperoxysulfanylnaphthalene-2-sulfonate .
user
C20H17N2Na3O15S4
assistant