Using Cc1nc2c(Cl)nc(N)nc2n1C1CCOCC1, OB(O)c1ccncc1 to produce Cc1nc2c(-c3ccncc3)nc(N)nc2n1C1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.