O=S(=O)([O-])c1ccc2c(/N=N\c3ccc(F)cc3)c(O)c(S(=O)(=O)O)cc2c1.[Na+]
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?