TWO TYPES OF CRYSTALLINE OF PINOCEMBRIN: A AND B, THEIR PREPARATION AND THEIR USE FOR MANUFACTURE OF PHARMACEUTICAL COMPOSITIONS

摘要

Two crystalline forms of pinocembrin of formula (I): ± and ², their preparation and their use for manufacture of pharmaceutical compositions. There exists difference between them in bioavailability. They are used for treating and preventing cerebral ischemic diseases by protective action of neurovascular unit, and enhancing blood drug level in vivo.