Using CCOC(=O)C(NC(=O)[C@H](CCCOCc1ccccc1)NC(=O)OC(C)(C)C)C(C)=O to produce CCOC(=O)c1nc(O)c(CCCOCc2ccccc2)nc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.