1H-Indole-1-carboxylic acid, 3-[[[[3,5-bis(trifluoromethyl)phenyl]methyl](methoxycarbonyl)amino]meth yl]-2-ethyl-2,3-dihydro-6-(trifluoromethyl)-, 1,1-dimethylethyl ester, (2R,3R)-rel-