CC1=CC(C)(C)N2C(=O)C3(C(C#N)=C(N)OC4=C3C(=O)CC(C)(C)C4)c3cccc1c32
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?