Using CCn1ncc2c(NC3CCNCC3)c(C3=NOC4(CCCC4)C3)cnc21, BrC1CCCC1 to produce CCn1ncc2c(NC3CCN(C4CCCC4)CC3)c(C3=NOC4(CCCC4)C3)cnc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.