COc1ccc(CN(C)C(=O)/C=C/[C@H]2O[C@@H](n3cc(C)c(=O)[nH]c3=O)C[C@@H]2O)cc1OC
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?