COc1cc(NC(=O)CC[C@H]2O[C@@H](n3cnc4c(NC(=O)c5ccccc5)ncnc43)[C@H](O)[C@@H]2O)cc(OC)c1OC
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?