Cc1cc(=O)c2c(O)cc3c(c2o1)CC=C(COC1OC(COC2OC(CO)C(O)C(O)C2O)C(O)C(O)C1O)CO3
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?