Using CCOC(=O)c1c(O)c(C(C)C)n[nH]c1=O, NCC(=O)[O-] to produce CC(C)c1n[nH]c(=O)c(C(=O)NCC(=O)O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.