abstract |
The present invention relates to free base crystals, in particular to (6aR,9aS)-5,6a,7,8,9,9a-hexahydro-5-methyl-3-(phenylamino)-2-((4-( 6-Fluoropyridin-2-yl)phenyl)methyl)-cyclopentadieno[4,5]imidazo[1,2-a]pyrazolo[4,3-e]pyrimidine-4(2H )-ketone crystals and methods of making and using the same. |