Using CCCc1c(Cc2ccccc2)ccc2c(=O)cc(CCC(=O)OC)oc12 to produce CCCc1c(Cc2ccccc2)ccc2c(=O)cc(CCC(=O)O)oc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.