O=C1[C@@H]2[C@@H]3O[C@@H]([C@H]4ON=C(c5ccccc5Cl)[C@H]43)[C@@H]2C(=O)N1c1ccc(Cl)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?