Using CCOC(=O)C(C(=O)CC)C(C(=O)CC)C(=O)OCC, NNC1=NCCN1 to produce CCOC(=O)c1c(C(=O)OCC)c(CC)n(NC2=NCCN2)c1CC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.