COc1ccc(S(=O)(=O)Nc2cccc3c2O[C@H](CN(C)Cc2ccccc2)[C@@H](C)CN([C@H](C)CO)C3=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?