CC(=O)OC1COC(n2c3ccccc3c3ccc4c5ccccc5[nH]c4c32)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?