CCOC(=O)C1CCN(C(=O)c2oc3ccc(S(=O)(=O)N4CC(C)CC(C)C4)cc3c2C)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?