Using CCCCCCCCCCCCCCCc1cc2cc(C(=O)O)ccc2[nH]1, CO to produce CCCCCCCCCCCCCCCc1cc2cc(C(=O)OC)ccc2[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.