Using Cc1c(Sc2cccc(/C=C/C(=O)O)c2)c2ccc(Cl)cc2n1Cc1ccccc1 to produce Cc1c(Sc2cccc(CCC(=O)O)c2)c2ccc(Cl)cc2n1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.