C[C@]12c3[nH]c4ccccc4c3CCN1C(=O)C(CC(=O)NCCc1ccccn1)C[C@@H]2C(=O)N1CCCCC1
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?