Task: Translation
Input (Czech): Zpusob prípravy (1S)-(3R)-1-azabicyclo[2.2.2.]okt-3-yl   3,4-dihydro-1-fenyl-2(1H)-isochinolinkarboxylátu  (solifenacinu) nebo jeho farmaceuticky akceptovatelných solí s vysokou optickou cistotou, pri nemž se surová báze solifenacinu prevede na hydrogentartrát, který se pak poprípade prevede na jinou farmaceuticky akceptovatelnou sul nebo na bázi solifenacinu. Krystalická sul solifenacinu hydrogentartrátu.
Output (English): A process for preparing (1S) - (3R) -1-azabicyclo [2.2.2] oct-3-yl 3,4-dihydro-1-phenyl-2 (1H) -isoquinolinecarboxylate (solifenacin) or a pharmaceutically acceptable salt thereof. by optical purity, wherein the solifenacin crude base is converted to the hydrogen tartrate, which is optionally converted to another pharmaceutically acceptable salt or solifenacin base. Crystalline salt of solifenacin hydrogen tartrate.