Using O, CC(=O)NC(CCCCB1OC(C)(C)C(C)(C)O1)(C(=O)NC(C)(C)C)[C@@H]1CCN(C(=O)OC(C)(C)C)C1 to produce N[C@@](CCCCB(O)O)(C(=O)O)[C@@H]1CCNC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.