Using CC(C)(C)OC(=O)CN1CCc2nc(C(=O)NC3CCC3)ccc2C1 to produce O=C(O)CN1CCc2nc(C(=O)NC3CCC3)ccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.