COC(=O)C1=C(O)C(C(=O)OC)[C@]2(O)[C@H](C(=O)OC)[C@H]1C[C@@H](c1ccc(OC)c(OC)c1)[C@H]2C(=O)OC
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?