C=C(C)C(=O)[C@@]12C(=O)[C@@H](C)CC[C@H]1[C@H](C)C[C@@H]2C=C(C)C
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?