Using C1COCCO1, Clc1nc(-c2ccccn2)ncc1-c1ccccc1 to produce O=Cc1ccc(-c2nc(-c3ccccn3)ncc2-c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.