Using CC(C)(C)OC(=O)NCC(=O)N[C@@]1(C(=O)O)C[C@H](Sc2nnc[nH]2)[C@H]2[C@H](C(=O)O)[C@H]21 to produce NCC(=O)N[C@@]1(C(=O)O)C[C@H](Sc2nnc[nH]2)[C@H]2[C@H](C(=O)O)[C@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.