CCOC(=O)CCC(C(=O)OCC)n1nnc2cc(Nc3c(C)[n+]([O-])c4cc(Cl)ccc4[n+]3[O-])ccc21
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?