O=S(=O)([O-])c1cc(/N=N/c2c(O)ccc3ccccc23)c2c(S(=O)(=O)O)cccc2c1.[Na+]
The donor in a hydrogen bond is usually a strongly electronegative atom such as N, O, or F that is covalently bonded to a hydrogen bond. How many hydrogen bond donors does the molecule have?