Using CC1(C)OC(=O)CC(=O)O1, Cc1ccccc1CSc1ccc(C=O)cc1 to produce Cc1ccccc1CSc1ccc(C=C2C(=O)OC(C)(C)OC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.