CNC1C(O)[C@@H]2OC(O[C@@H]3C(O)C(O)C(N)C[C@H]3N)C(N)C[C@H]2O[C@H]1O[C@@H]1OC(CO)C(N)C(O)C1O
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?