Using CCCc1c2c(c(CCC)c(C(=O)OC)c1C(=O)OC)CCCC2 to produce CCCc1c(C(=O)OC)c(C(=O)OC)c(CCC)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.