O=C(Nc1ccccc1)c1ccc2c(O)c(S(=O)(=O)c3ccc(Cl)cc3)c(=O)[nH]c2c1
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?