O=C(c1ccc(S(=O)(=O)N2CCOCC2)cc1)N(c1cccc(Cl)c1)C1C=CS(=O)(=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?