Using Cn1cc(-c2ccc3nnc(Sc4ccc5ncc(N6CCCNCC6)cc5c4)n3c2)cn1, OCCBr to produce Cn1cc(-c2ccc3nnc(Sc4ccc5ncc(N6CCCN(CCO)CC6)cc5c4)n3c2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.