COc1cc([C@@H]2c3cc4c(cc3[C@@H](NC(=O)c3cccc([N+](=O)[O-])c3)C3COC(=O)[C@@H]32)OCO4)cc(OC)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?