Using COB(OC)OC, c1ccc2c(c1)sc1cccc(-c3cccc4sc5ccccc5c34)c12 to produce OB(O)c1cccc2c1sc1cccc(-c3cccc4sc5ccccc5c34)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.