O=C(CCn1c(=O)c2ccccc2n(Cc2cccc([N+](=O)[O-])c2)c1=O)N1CCc2ccccc2C1
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?