Using CCc1c(Cc2cc(C)cc(C)c2)n(COCCCCOC(=O)c2ccccc2)c(=O)[nH]c1=O to produce CCc1c(Cc2cc(C)cc(C)c2)n(COCCCCO)c(=O)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.