CC(=O)c1c(C)oc2ccc(N(C(=O)Oc3ccccc3)S(=O)(=O)c3ccc(Cl)cc3)cc12
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?