O=C(/C=C/c1cccc([N+](=O)[O-])c1)NCCN1C(=O)S/C(=C\c2ccc(F)cc2)C1=O
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?