Using COCCCOc1cc(C(=O)N(C[C@@H]2CN(C(=O)OC(C)(C)C)C[C@H]2C=O)C(C)C)ccc1OC, CN to produce CNC[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H]1CN(C(=O)c1ccc(OC)c(OCCCOC)c1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.