CN(Cc1ccccc1)C(=O)c1cccc(NC(=O)Cc2ccc(NC(=O)C3CCCN(C(=O)CCc4ccccc4)C3)cc2)c1
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?