Not less than-95.0%
(3S,5aS,9aS,10aS)-3-Methyldecahydropyrazino[1,2-a]indole-1,4-dione; 1,4-Dione, (3S,5aS,9aS,10aS)-3-methyldecahydropyrazino[1,2-a]indole-;