O=C1[C@@H]2[C@@H]3CCCN3[C@@]3(C(=O)Nc4ccccc43)[C@@H]2C(=O)N1c1cc(Cl)cc(Cl)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?