4-(4-bromobutoxy)chromen-2-one

9-(4-bromobutoxy)furo[3,2-g]chromen-7-one

2'-bromospiro[cyclopentane-1,9'-fluorene]

1-(4-quinolin-1-ium-1-ylbutyl)quinolin-1-ium,bromide

[1-(4-bromobutyl)phosphinan-1-ium-1-yl]methyl-trimethylsilane,bromide