Using CC(C)(C)OC(=O)N[C@H]1CC[C@H](O)CC1, C1COCCOCCOCCOCCO1 to produce CO[C@H]1CC[C@H](NC(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.