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![(1S,2S)-(−)-N,N′-Dimethyl-1,2-bis[3-(trifluoromethyl)phenyl]ethylenediamine](https://api.sigmaaldrich.com/deepweb/assets/sigmaaldrich/b2b/images/952/068/aldrich_707538_s/aldrich_707538_s_w640.jpg)