Using CCOC(=O)c1c(C)nn(-c2ccc(Cc3c(CC)nn4c(C)cc(C)nc34)cc2)c1N to produce CCOC(=O)c1cn(-c2ccc(Cc3c(CC)nn4c(C)cc(C)nc34)cc2)nc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.