Using COC(=O)c1c(C)nc(C#CCNC(=O)OC(C)(C)C)nc1Nc1cccc(C)c1 to produce COC(=O)c1c(C)nc(CCCNC(=O)OC(C)(C)C)nc1Nc1cccc(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.