O=C(CCc1nnc2s/c(=C\c3ccc([N+](=O)[O-])cc3)c(=O)n12)Nc1ccc(Cl)c(Cl)c1
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?