Using C=CCc1c(O)ccc2c(C)c(CC(=O)OC)c(=O)oc12 to produce CCCc1c(O)ccc2c(C)c(CC(=O)OC)c(=O)oc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.