CC(=O)OCC1OC(N2C(=O)[C@@H](Oc3ccccc3)[C@H]2/C=C/c2ccccc2)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
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?