Using COC(=O)c1cn(-c2ccnc3ccccc23)c2cc(OC)ccc12 to produce COc1ccc2c(C(=O)O)cn(-c3ccnc4ccccc34)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.