Using COC(=O)CCCCCCCCCCCCC1=C(C)C(=O)C(OC)=C(OC)C1=O to produce COC1=C(OC)C(=O)C(CCCCCCCCCCCCC(=O)O)=C(C)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.