Cc1ccc(N(C=O)c2c([N+](=O)[O-])cc([N+](=O)[O-])c3c2=[N+]([O-])CN=3)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?