Using COc1cccc(-c2ccsc2C2CC(=O)C=C(O)C2)n1, CC(=O)OC(C)=O to produce COc1cccc(-c2ccsc2C2CC(=O)C(C(C)=O)=C(O)C2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.