Using COC(=O)c1ccc(Cc2cn(C)c3ccc(/C=C(\C)C(=O)O)cc23)c(OC)c1 to produce COC(=O)c1ccc(Cc2cn(C)c3ccc(CC(C)C(=O)O)cc23)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.