Using CCCC(c1ccc(C(=O)O)cc1)n1ccnc1, OC1CCCCC1 to produce CCCC(c1ccc(C(=O)OC2CCCCC2)cc1)n1ccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.