Using CCOC(=O)C1=C(C(OC)OC)NC(C(OC)OC)=C(C(=O)OCC)C1 to produce CCOC(=O)c1cc(C(=O)OCC)c(C(OC)OC)nc1C(OC)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.