Using C=C(OCC)c1c(C)c2cnc(Nc3ccc(N4CCOCC4)cn3)nc2n(C2CCCC2)c1=O to produce CC(=O)c1c(C)c2cnc(Nc3ccc(N4CCOCC4)cn3)nc2n(C2CCCC2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.