Using C=CCN, CCOC(=O)c1cc2c(C(=O)CCl)ccc(O)c2[nH]1 to produce C=CCNCC(=O)c1ccc(O)c2[nH]c(C(=O)OCC)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.