Using COC1=C(OC)C(=O)C(CCCCCCCCCCOC(C)=O)=C(C)C1=O to produce COc1c(O)c(C)c(CCCCCCCCCCOC(C)=O)c(O)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.