COc1cc(C2C(C(=O)Nc3ccc([N+](=O)[O-])cc3)=C(C)NC(C)=C2C(=O)Nc2ccc([N+](=O)[O-])cc2)ccc1O
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?