 Complete the following phrase:  The groups original leaders were Old Bolsheviks Valerian Obolensky-Ossinsky, Vladimir Smirnov, Timofei Sapronov, V. N. Maximovsky, M. S. Boguslavsky, A. Z. Kamensky, Isaak Dashkovsky and Raphail Farbman. Their influence within the Party, always limited, peaked at the 