O=C(c1ccc(S(=O)(=O)c2cccc(Cl)c2)c([N+](=O)[O-])c1)N1CCN(c2ccccn2)CC1
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?