COC(=O)C1C(C(=O)OC)C2(OC(c3ccc(Cl)cc3)=CC2=O)C12OC(c1ccc(Cl)cc1)=CC2=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?