Using C=CCCNC(=O)CN(C(=O)OC(C)(C)C)[C@H](C)CO to produce C=CCCN1C[C@@H](C)N(C(=O)OC(C)(C)C)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.