CCOC(=O)N1CCC(NC(=O)c2cc(C(=O)Nc3ccc(S(=O)(=O)N4CCCCC4)cc3)ccc2CO)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?