O=C(O)C1=CC[C@@H](c2ccc(Cl)cc2)N(S(=O)(=O)c2ccc(Cl)cc2)[C@H]1c1ccc(F)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?