Cc1ccc2oc(=O)c3c(O)c4cccc(OC5OC(C)C6O[C@@H](c7ccccc7)OC6C5OC5OC(C)C(O)C(O)C5O)c4c4oc(=O)c1c2c34
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?