Original: The group originally came together in 1945 as the Moscow Conservatoire Quartet with Mstislav Rostropovich on cello, Rostislav Dubinsky and Nina Barshai on first and second violins and Rudolf Barshai on viola, all members of a class taken by Mikhail Terian, the viola player of the Comitas Quartet.
Simplified: Mstislav Rostropovich was the cellist, Rostislav Dubinsky and Nina Barshai played the violins and Rudolf Barshai played the viola.