COC(=O)Cc1c(-c2c(CC(=O)OC)c3ccccc3n2C2OC(COC3OC(COC(C)=O)C(OC(C)=O)C(OC(C)=O)C3OC(C)=O)C(O)C(O)C2O)[nH]c2ccccc12
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?