O=C(c1ccc(-c2nnc(Nc3cccc(Cl)c3)c3ccccc23)cc1)N1C[C@H]2C[C@H](C1)c1cccc(=O)n1C2
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?