Using CCCC(=O)O, Cc1c(C)c(C2CC(=O)CC(=O)C2)c(C)c2c1OC(C)(C)C2 to produce CCCC(=O)C1=C(O)CC(c2c(C)c(C)c3c(c2C)CC(C)(C)O3)CC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.