C=C(C)C(=O)O[C@H]1C/C(CO)=C/CCC(=C)C(OC(C)=O)[C@H]2OC(=O)C(=C)[C@H]12
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?