Nikolai Grigoryevich Rubinstein ( Russian : Никола́й Григо́рьевич Рубинште́йн ; 14 June ( O.S. 2 June ) 1835 - 23 March ( O.S. 11 March ) 1881 ) was a Russian pianist , conductor and composer .
Nikolai Grigoryevich Rubinstein ( born Moscow , 2 June 1835 ; died Paris , 23 March 1881 ) was a Russian pianist and composer .