CCOC(=O)C1=C[C@@H](C(C)(C)C)N(S(=O)(=O)c2ccc(C)cc2)[C@H]1c1ccc(OC)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?