C=CCN1C=C2C(=O)C(C)(OC(=O)CCc3ccccc3)C(=O)C=C2C=C1c1ccc(C#N)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?