CO[C@H]1C=C2CCN(C)[C@H]2C2c3cc4c(cc3C(=O)O[C@@H]21)OCO4.O=[N+]([O-])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?