Using CCCn1c(C)nc2cc3c(cc21)C1CC3CN(C(=O)OC(C)(C)C)C1 to produce CCCn1c(C)nc2cc3c(cc21)C1CNCC3C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.