C=C1C(=O)O[C@@H]2C=C(C)C3=CC(=O)[C@](C)(C[C@H](OC(=O)/C(C)=C\C)[C@@H]12)O3
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?