Cc1ccc(S(=O)(=O)[N-]C2C(=O)c3ccccc3C(=O)C2[n+]2cccc(C(N)=O)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?