O=[N+]([O-])c1cc(S(=O)(=O)Nc2cccc(Cl)c2)ccc1N=Nc1c(O)[nH]c2ccccc12
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?