COc1ccc(C2=NN(C(=O)COC(=O)c3ccc(S(C)(=O)=O)c([N+](=O)[O-])c3)C(c3ccco3)C2)cc1
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?