O=C(Nc1ccc(Cl)cc1C(=O)c1ccccc1)c1ccc(Nc2nc(-c3ccccc3)c3cc(Br)ccc3n2)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?