Cc1nc(/N=N/c2ccc(C(=O)[O-])cc2)c(COP(=O)([O-])[O-])c(C=O)c1O.[Na+].[Na+].[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?