CN(C(=O)c1ccc(NC(=O)Cc2cccc(NC(=O)C3CCN(C(=O)C4CCCC4)CC3)c2)cc1)C1CCCC1
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?