Using CCCCCCCCCCCCc1cn(C(C(=O)OCC)c2ccccc2)cn1 to produce CCCCCCCCCCCCc1cn(C(C(=O)O)c2ccccc2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.