COc1ccc(C(=O)Nc2ccc[n+](-c3nc4ccccc4nc3[N-]S(=O)(=O)c3ccccc3)c2)cc1
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?