CC(C)(C)C(=O)C1C(c2ccccc2)C2(C(=O)c3ccccc3C2=O)C2C=CC(C#N)=CN12
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?