Using Cc1ccc2c(c1)OCC(C)N2, CCOC=C(C(=O)OCC)C(=O)OCC to produce CCOC(=O)c1cn2c3c(cc(C)cc3c1=O)OCC2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.