Using COCCCn1cncc1C(C)(C)C, CC(C)(C)OC(=O)N1CCCC(=O)C1 to produce COCCCn1c(C(C)(C)C)cnc1C1(O)CCCN(C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.