Nc1c(/N=N/c2ccc(S(=O)(=O)CCOS(=O)(=O)[O-])cc2)c(S(=O)(=O)[O-])cc2cc(S(=O)(=O)[O-])c(/N=N/c3ccc(S(=O)(=O)CCOS(=O)(=O)[O-])cc3)c(O)c12.[Na+].[Na+].[Na+].[Na+]
How many hydrogen bond donors does the molecule have?