Using COc1ccc2c(c1)CCCN2, CCOC=C(C(=O)OCC)C(=O)OCC to produce COc1cc2c3c(c1)c(=O)c(C(=O)O)cn3CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.