Using CCOCC(O)c1cccc(Br)n1, CCOC(=O)COc1ccc(S)cc1C to produce CCOCC(Sc1ccc(OCC(=O)OCC)c(C)c1)c1cccc(Br)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.