O=C(CNc1c(Cl)cccc1Cl)NC1C=Cc2ccc(S(=O)(=O)Nc3c(Cl)cccc3Cl)cc2C1=O
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?