Cc1ccc(C(=O)[C@@H]2[C@H]3[C@H]4CO[C@H](O4)C(=O)[C@H]3[C@@H]3C=Cc4ccccc4N23)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?