Captisol is a proprietary sulfobutylether-cyclodextrin process-specifi c composition that is a mixture of
regional and positional isomers consistently produced via a patented all-aqueous process originally
discovered at the University of Kansas. The motivation for Captisol’s discovery was to provide a
parenterally safe material broadly applicable across all drug classes for solubilizing and stabilizing
intractable drug candidates as opposed to historically used toxic cosolvents and surfactants.