Using COCc1c(C(=O)OC(C)C)ncc2[nH]c3ccc(C#Cc4ccc(Cl)cc4)cc3c12 to produce COCc1c(C(=O)OC(C)C)ncc2[nH]c3ccc(CCc4ccc(Cl)cc4)cc3c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.