Using CCOCCn1c(C)nc2c(N(Cc3ccccc3)Cc3ccccc3)nc(Cl)c(C)c21 to produce CCOCCn1c(C)nc2c(N)ncc(C)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.