Using CN1OCCC(C(O)c2nc(C(C)(C)C)c(O)c(C(C)(C)C)n2)C1=O to produce CN1OCC/C(=C\c2nc(C(C)(C)C)c(O)c(C(C)(C)C)n2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.