C=C1C(=O)OC2/C=C(/C)C(OC(C)=O)C/C=C(\C)C(OC(=O)C3(C)OC3C)C(O)C12
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?