Using CC(O)=S, C=Cc1cccc(OCc2ccc(C(=O)OC)cc2)c1C(=O)OC to produce COC(=O)c1ccc(COc2cccc(CCSC(C)=O)c2C(=O)OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.