CC(C)C[C@@H](CC(=O)N[C@@H](CCCN)CC(=O)N[C@@H]1CCNC[C@H]1C(=O)N[C@H](CC(=O)N[C@@H](CCC(=O)O)CC(=O)O)CC(C)C)NC(=O)[C@@H]1CCCC[C@H]1N
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?