Using C=CCC[C@@H](C)O[C@@H](CC)[C@H](NC(=O)OC(C)(C)C)C(=O)N1C[C@H](O)C[C@H]1C(=O)OC to produce C=CCC[C@@H](C)O[C@@H](CC)[C@H](NC(=O)OC(C)(C)C)C(=O)N1C[C@H](O)C[C@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.