Using CCOC(=O)COc1ccc2nc(CC)cc(OCc3ccc(-c4ccccc4-c4nnn(C(c5ccccc5)(c5ccccc5)c5ccccc5)n4)cc3)c2n1 to produce c1cnc2cccnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.