N[C@@H]1[C@@H]2[C@@H]3C[C@H]4N(CC[C@@]14C(=O)C(=O)O)CC3=CCO[C@@H]2CC(=O)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?