for the following products
(1R,2R)-(+)-N,N'-dimethyl-1,2-bis-3-(trifluoromethyl)phenylâ-1,2-ethane diamine | (1R,2R)-(+)-N,N'-Dimethyl-1,2-bis[3-(trifluoromethyl)phenyl]ethylenediamine and (1R,2R)-(+)-N,N'-dimethyl-1,2-bis[3-(trifluoromethyl)phenyl]-1, 2-ethanediamine