O=C1c2ccccc2C(=O)C12OC(c1ccccc1)C1(C(=O)c3ccccc3C1=O)C2c1cccc([N+](=O)[O-])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?