Using C=C(C)c1cccc2c(-c3ccccc3)n(Cc3ccccc3)nc12 to produce CC(C)c1cccc2c(-c3ccccc3)n(Cc3ccccc3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.