CC1=C(O)C(=O)C2=C(C1=O)[C@@H]([C@@H](C)C/C=C/C(C)(C)O)CC[C@@H]2C
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?