3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(2-fluoro-5-nitrophenyl)-, 2,2-dimethyl-3-(methyl(phenylmethyl)amino)propyl methyl ester, monohydrochloride, R(-)- TC 81 (R(-)-isomer) US7970350