Using CC1(C)Cc2c(cccc2N2CCN(C(=O)OC(C)(C)C)CC2)CN1 to produce CC1(C)Cc2c(cccc2N2CCN(C(=O)OC(C)(C)C)CC2)C=N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.