Using O=C([O-])[O-], CCCc1c(OCCCCC#N)ccc(C(=O)c2ccccc2O)c1O to produce CCCc1c(OCCCCC#N)ccc(C(=O)c2ccccc2OC)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.