NC(=O)c1ccc[n+](C2=C([N-]S(=O)(=O)c3ccccc3)C(=O)c3ccccc3C2=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?