Lev Kamenev arrested in 1902, ending his formal education. From that point on, he worked as a professional revolutionary, and was active in the capital St. Petersburg, Moscow and Tiflis. He adopted the surname Kamenev during this period. In the early 1900s, he married Olga Bronstein, a fellow Marxist (and younger sister of Leon Trotsky, who had also adopted a different surname). The couple had two sons together. Kamenev joined the Communists in 1901. He took a brief trip abroad in 1902, meeting Russian social democratic leaders living in exile, including Vladimir Lenin, whose adherent and close associate he became. He also
Mikhail Davidovich Mashkovsky of the Registry of Medical Compounds, which can be likened to the Pharmacopoeial Committee of Soviet Union. Mikhail Davidovich Mashkovsky Mikhail Davidovich Mashkovsky () (March 1, 1908 - June 5, 2002) was a famous Russian pharmacologist, and Academician of the Russian Academy of Science, the author of the famous Soviet and later on Russian pharmacopoeia "Medical compounds", which had 15 successful editions (the last 15th edition was published after his death in 2005 in Russia). He was born on 1 March 1908. In 1934 he graduated from Second Moscow Medical Institute named after Pirogov. In 1938 he started his work