Original: Kazan University is known as "the birthplace of organic chemistry" due to works of Aleksandr Butlerov, Vladimir Markovnikov, Aleksandr Arbuzov, and the birthplace of Electron Spin Resonance due to work of Evgeny Zavoisky.
Simplified: Kazan University is also known as "the birthplace of organic chemistry" because of the works of Aleksandr Butlerov, Vladimir Markovnikov, Aleksandr Arbuzov, and others.