Using COC(=O)c1ccc2nc(-c3ccccc3)c(N3CCOCC3)nc2c1 to produce O=C(O)c1ccc2nc(-c3ccccc3)c(N3CCOCC3)nc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.