COc1cccc(C2C(C(=O)C(C)(C)C)N3C=C(C#N)C=CC3C23C(=O)c2ccccc2C3=O)c1OC
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?