C[C@@]12C(=O)Nc3ccc(Cl)cc3C(=O)N1[C@H]1c3ccccc3OC[C@@H]1[C@@H]2c1ccccc1
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?