C#Cc1ccc([C@H]2C=C(C(=O)N3CCN(Cc4ccccc4)CC3)O[C@@H](OCc3ccc(CO)cc3)C2)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?