As for this invention, formula (i):< Conversion 8 >Two crystal multiformities, and those blends which are shown with each one of A shape and B shape of epochironanarogu are offered. In addition as for this invention, also new multiform manufacturing method, the remedy study method of using those and the medicine dosage form which contains those are offered.本発明は、式(I):【化8】のエポチロンアナログのA形およびB形のそれぞれで示される2つの結晶多形、並びにそれらの混合物を提供する。本発明はまた、新規な多形の製造法、それらを用いた治療学的な方法およびそれらを含有する医薬的な投与形態をも提供する。