Using COCCC(=O)COC, COc1ccc(-c2cccc3cn(C)nc23)c(C)c1 to produce COCCC(O)(COC)c1c2cccc(-c3ccc(OC)cc3C)c2nn1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.