COC(=O)[C@@H]1C[C@@]2(O)[C@H](O)[C@H](O)[C@H](O)C[C@H]2N1Cc1cccc2ccccc12
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?