CCOC(=O)c1sc(N2C(=O)C(O)=C(C(=O)c3ccco3)C2c2cccc([N+](=O)[O-])c2)nc1C
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?