C[C@H]1CN(C(=O)c2nc3ccc(Cl)cn3c2CN[C@H]2CCCCNC2=O)C[C@@H](C)O1
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?