BS3
4-Azido-2,3,5,6-tetrafluorobenzoic acid
A fluorinated aryl azide that has been used as a photo-cross linker to study the estrogen receptor.
4-(N-Maleimido)benzophenone
Benzophenone-4-iodoacetamide
A sulfhydryl reactive heterobifunctional photocrosslinking reagent