CCC(C)C(NC(=O)OC(C)(C)C)C(=O)Oc1ccc2c(=O)c(-c3ccc([N+](=O)[O-])cc3)c(C)oc2c1
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?