O=C1N[C@@H](c2c[nH]c3ccc(Br)cc23)C(=O)N[C@H]1c1c[nH]c2ccc(Br)cc12
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?