COc1cc(OC2OC(CO)C(O)C(O)C2O)c2c(c1)O[C@@H]1[C@H](O)Oc3cc(OC)c(OC)cc3[C@]1(O)C2=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?