Using CC(=O)c1c(OCC=C(C)C)ccc2c(=O)c3ccccc3oc12, O=Cc1ccccc1 to produce CC(C)=CCOc1ccc2c(=O)c3ccccc3oc2c1C(=O)C=Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.