Using CN1CCC(Nc2cc(N)ncc2Br)CC1, N#Cc1nccnc1Br to produce CN1CCC(Nc2cc(Nc3cnc(C#N)cn3)ncc2Br)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.