COc1ccc(OC2OC(COC(c3ccccc3)(c3ccc(OC)cc3)c3ccc(OC)cc3)C(O)C(O)C2O)cc1
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?