Using CNc1nccc(-c2cc(N3CCN(C(=O)OC(C)(C)C)CC3)c3cc(OC)ccc3c2)n1 to produce CNc1nccc(-c2cc(N3CCNCC3)c3cc(OC)ccc3c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.