C[C@H]1NC(=O)[C@]2(C)[C@@H](c3ccccc3)[C@H]3COc4ccccc4[C@@H]3N2C1=O
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?