Using CCCSc1ncc(CCl)n1Cc1ccccc1Cl, CCOC(=O)CC(=O)OCC to produce CCCSc1ncc(CC(C(=O)OCC)C(=O)OCC)n1Cc1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.