O=c1c(O)c(-c2ccc(O)c(O)c2)oc2c(OC[C@H]3O[C@@H](O)[C@@H](O)[C@H](O)[C@@H]3O)c(O)cc(O)c12
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?