Cc1cc(C)n(-c2ccc(C(=O)N3CCN(S(=O)(=O)c4ccc(C(C)C)cc4)CC3)cc2)n1
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?