O=C(c1ccc(S(=O)(=O)N2CCCCC2)cc1)N1CCN(CCN2C(=O)c3cccc4cccc(c34)C2=O)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?