abstract |
The present invention relates to (6aR, 9aS) 5,6a, 7,8,9,9a hexahydros 5 methyl 3 (phenyl amino) 2 ((4 (base of 6 fluorine pyridine 2) phenyl) methyl) cyclopenta [4,5] imidazo [1,2 a] pyrazolo [4,3 e] pyrimidine 4 (2H) ketone acid-addition salts and salt crystal, composition and preparation comprising it and the method using the salt and crystal. |