Using C1=COCCC1, O=C(O)C1CC2CC1C1C3=C4C5CCC(C5)C4C(C3)C21 to produce O=C(OC1CCCCO1)C1CC2CC1C1C3=C4C5CCC(C5)C4C(C3)C21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.