Using CCCn1c(=O)c2c(nc(C(C)(C)C)n2Cc2ccccc2)n(CCC(=O)OC)c1=O to produce CCCn1c(=O)c2c(nc(C(C)(C)C)n2Cc2ccccc2)n(CCC(=O)O)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.