Using Cc1c(C(=O)O)ccc2sc(=O)n(C)c12, O=C1CCCC(=O)C1 to produce Cc1c(C(=O)OC2=CC(=O)CCC2)ccc2sc(=O)n(C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.