Using COc1ccc(C(C)(O)Cn2c3c(c4cc(Cl)ccc42)CN(C)CC3)cc1 to produce COc1ccc(/C(C)=C/n2c3c(c4cc(Cl)ccc42)CN(C)CC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.