Using C1CCNC1, O=Cc1cnn2c(NC3CC3)cc(-c3ccc(CBr)s3)nc12 to produce O=Cc1cnn2c(NC3CC3)cc(-c3ccc(CN4CCCC4)s3)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.