Using COc1ccc2nccc(-c3ccc(CCNC(=O)OC(C)(C)C)nc3)c2n1 to produce COc1ccc2nccc(-c3ccc(CCN)nc3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.