CC(C)(C)N1C(=O)[C@@H]2[C@@H](CC[C@@H]3C(=O)C=C[C@@H](O)[C@H]32)C1=O
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?