Using C=CCc1cc(C(C)=O)c(O)cc1OCCCCC#N, O=C([O-])[O-] to produce C=CCc1cc(C(C)=O)c(OC)cc1OCCCCC#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.