Using CCCC(Cn1c(=O)n(Cc2cn(C)c3cccc(C)c23)c2cccnc21)C(=O)OCC to produce CCCC(Cn1c(=O)n(Cc2cn(C)c3cccc(C)c23)c2cccnc21)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.