FIELD: organic synthesis. SUBSTANCE: separation of racemic (±)-(2R,3R, 2S,3S)-2- (diphenylmethyl)-3-(2-methoxy-5-isopropylphenyl)methiamino-1- azabicyclo-[2,2,2] -octane consists in interaction thereof with 1R-(-)-10- camphorsulfonic acid in solvent to give 2S,3S-enantiomer after selective precipitation in the form of camphorsulfonic acid salt of formula I: 
(I) or in the form of free base. EFFECT: facilitated separation procedure. 10 cl
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