Using CCOC(=O)C(CCCNC(=O)OC(C)(C)C)NC(=O)n1cc(C)c(=O)[nH]c1=O to produce Cc1cn(C(=O)NC(CCCNC(=O)OC(C)(C)C)C(=O)O)c(=O)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.