Using COC(=O)C(Cc1ccc(OCCc2nc(-c3ccccc3)oc2C)cc1)C(=O)OC to produce COC(=O)C(Cc1ccc(OCCc2nc(-c3ccccc3)oc2C)cc1)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.