Combretastatin B-1

Combretastatin B-1 is a combretastatin and a dihydrostilbenoid. It can be found in Combretum caffrum, the Eastern Cape South African bushwillow tree or in Combretum kraussii, the forest bushwillow.

It can be produced by selective hydrogenation of combretastatin A-1.

It is a potent inhibitor of microtubule assembly in vitro.