CC(C(N)C(=O)NC(C(=O)O)C1OC(n2ccc(=O)[nH]c2=O)C(O)C1O)C(O)c1ccc(O)cn1
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?