C=C[C@@]1(C)CC(=O)[C@]2(O)[C@](C)(O1)[C@@H](OC(C)=O)[C@@H](OC(=O)CCN(C)C)[C@H]1C(C)(C)CC[C@H](O)[C@@]12C
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?