Using O=C(O)c1ccc2oc3c(c(=O)c2c1)CCC3, COc1ccccc1C=O to produce COc1ccccc1C=C1CCc2c1oc1ccc(C(=O)O)cc1c2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.