Using COc1c(CC#N)cccc1Sc1ccccc1C, CCOC(=O)[O-] to produce CCOC(=O)C(C#N)c1cccc(Sc2ccccc2C)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.