Using O=Cc1ccc(CCC(=O)O)cc1, CC(=O)c1sc(C)c2c1C[C@@H]1[C@H]2C1(C)C to produce Cc1sc(C(=O)C=Cc2ccc(CCC(=O)O)cc2)c2c1[C@H]1[C@@H](C2)C1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.