Using COC(=O)CCCCCCCCn1nc(-c2ccccc2)c(-c2ccccc2)cc1=O to produce O=C(O)CCCCCCCCn1nc(-c2ccccc2)c(-c2ccccc2)cc1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.