Using Cn1cc(-c2cnc3nnn(CC4CCCN(c5ncc(C6=CCNCC6)cn5)C4)c3n2)cn1, OCCBr to produce Cn1cc(-c2cnc3nnn(CC4CCCN(c5ncc(C6=CCN(CCO)CC6)cn5)C4)c3n2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.