Using COC(=O)c1ccc2nc(-c3ccccc3)c(-c3cccc(OC)c3)nc2c1 to produce COc1cccc(-c2nc3cc(CO)ccc3nc2-c2ccccc2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.