Lurasidone Impurity I Catalogue L536759 CAS 1260138-03-1 M.W 344.52 M.F C19H28N4S Specifications FAQs ((1R,2R)-2-((4-(Benzo[d]isothiazol-3-yl)piperazin-1-yl)methyl)cyclohexyl)methanamine