COc1ccc2c(c1)O[C@@H](c1ccc3c(c1)OCO3)[C@H](OC(=O)Nc1ccc(C)c(Br)c1)C2=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?