This invention relates to relates to methods for producing gossypol acetic
acid co-crystals and (-)-gossypol acetic acid co-crystals. The invention
also relates to pharmaceutical compositions comprising gossypol acetic
acid co-crystals and (-)-gossypol acetic acid co-crystals and the use of
gossypol acetic acid co-crystals and (-)-gossypol acetic acid co-crystals
for inducing apoptosis in cells and for sensitizing cells to the
induction of apoptotic cell death.