COc1ccc2c(c1)C(=O)[C@@H](OC(=O)NCc1ccco1)[C@H](c1ccc(OC)c(Br)c1)O2
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?