Using CCOCC, CCCc1ccccc1OCCCCCOc1ccc2c(c1CCC)OC(C(=O)O)CC2=O to produce CCCc1c(OCc2ccccc2)ccc2c1OC(CO)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.