Myo-inositol trispyrophosphate (ITPP), also known as OXY111A, is an inositol phosphate that causes a rightward shift in the oxygen hemoglobin dissociation curve through allosteric modulation of hemoglobin within red blood cells.  It is an experimental drug intended to reduce tissue hypoxia.  The effects appear to last roughly as long as the affected red blood cells remain in circulation.