COc1ccc(-c2ccc(O[C@@H]3OC(C)(C)[C@H](OC)[C@@H](O)[C@H]3O)cc2C(=O)NCCc2ccccc2)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?