Using CCOC(=O)C(C(C)=O)C(C(C)=O)C(=O)OCC, NNC1=NCCN1 to produce CCOC(=O)c1c(C(=O)OCC)c(C)n(NC2=NCCN2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.