Using Clc1nc(N2CCOCC2)c2sccc2n1, OB(O)c1cccc2[nH]ccc12 to produce c1cc(-c2nc(N3CCOCC3)c3sccc3n2)c2cc[nH]c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.