Lurasidone Impurity :(3aR,4S,7R,7aS)-2-{(1S,2S)-2-[4-(1,2-benzisothiazol-3-yl)-piperazin-1-yl-methyl]-cyclohexyl methyl} hexahydro-4,7-methano-2H-isoindole-1,3-dione hydrochloride (1S, 2S Enantiomer)..