Using COc1ccc2[nH]c(C3=CCC(Cc4ccccc4)(N(C)C)CC3)c(C)c2c1 to produce COc1ccc2[nH]c(C3CCC(Cc4ccccc4)(N(C)C)CC3)c(C)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.