Using CCOC(=O)C(Cc1ccc(OC)c(N)c1)OC(C)C, CC(C)(C)OC(=O)OC(=O)OC(C)(C)C to produce CCOC(=O)C(Cc1ccc(OC)c(N=C=O)c1)OC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.