Using CCCCOC(=O)CC(=O)OCCCC, CCCCOC(=O)/C=C\C(=O)OCCCC to produce CCCCOC(=O)CC(C(=O)OCCCC)C(C(=O)OCCCC)C(=O)OCCCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.