Using CC(C)(C)OC(=O)CCNc1cc(N2CCOCC2)nc2c(-c3cnc4ccccc4c3)cnn12 to produce O=C(O)CCNc1cc(N2CCOCC2)nc2c(-c3cnc4ccccc4c3)cnn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.