C[C@H]1C[C@@H](C)CN(S(=O)(=O)c2cc(Cl)c(Oc3ccc([N+](=O)[O-])cc3Cl)c(Cl)c2)C1
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?