Question: Alexander Pavlovich Dianin, was a Russian chemist from Saint Petersburg, and was married to the adopted daughter of fellow chemist Alexander Borodin, was a Russian Romantic composer of Georgian origin, as well as a doctor and chemist, he was one of the prominent 19th century composers, known as what?

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Alexander Kantorov: Alexander Kantorov (born 1947) is a Russian conductor who was born in Leningrad (now Saint Petersburg) and was a graduate of both Moscow and Saint Petersburg Conservatories.  He used to take violin lessons under guidance from Mikhail Vaiman and then completed postgraduate education under guidance from Yuri Temirkanov.  He began his conducting career at the Sverdlovsk Philharmonic Symphony Orchestra and then became both a fonder and head conductor of both Sverdlovsk and Saint Petersburg Symphony Orchestras. Currently he conducts numerous works by such famous Russian composers as Nikolai Rimsky-Korsakov, Sergei Prokofiev, Sergei Rachmaninoff, Dmitri Shostakovich, Alexander Taneyev, Pyotr Ilyich Tchaikovsky, as well as German composers such as Ludwig van Beethoven, Johannes Brahms, Wolfgang Amadeus Mozart, Julian Cochran from Australia and Gustav Mahler with Anton Bruckner from Austria.  Besides those, he also conducted works of Hector Berlioz and Antonín Dvořák.

Alexander Dianin: Alexander Pavlovich Dianin (Russian: Александр Павлович Дианин ; April 20, 1851 – December 6, 1918) was a Russian chemist from Saint Petersburg.  He carried out studies on phenols and discovered a phenol derivative now known as bisphenol A and the accordingly named Dianin's compound.  He was married to the adopted daughter of fellow chemist Alexander Borodin.  In 1887, Dianin succeeded his father-in-law as a chair of the Chemistry Department at the Imperial Medical-Surgical Academy in St. Petersburg.

Pyotr Yefremov: Pyotr Alexandrovich Yefremov (Russian: Пётр Александрович Ефремов , born November 17 (O.S., 2), 1830, Moscow, Russian Empire, - died January 8, 1908 [O.S. December 26, 1907], Saint Petersburg, Russian Empire) was a Russian literary historian, publisher, editor and essayist whose works were published regularly by "Sovremennik" (where he debuted in 1857), "Otechestvennye Zapiski", "Russky Arkhiv", "Russkaya Starina", "Istorichesky Vestnik", newspapers "Golos", "Novoye Vremya", "Russkiye Vedomosti".  In 1864-1865 he edited the "Knizhny Vestnik" (The Books Herald) magazine.  Praised as one of the most competent literary scholars of the 19th century, Pyotr Yefremov compiled, edited and published the series of The Works of: Denis Fonvizin (1866), Valerian Maykov (1867), Antiochus Kantemir (1867-1868), Vladimir Lukin (1868), Bogdan Yelchaninov (1868), Alexander Radishchev (1872, Saint Petersburg; banned at the time), Kondraty Ryleyev (1872, 1874), Mikhail Lermontov (1873, 1880, 1887, 1889, also the "Early Dramas" compilation, 1880), Vasily Zhukovsky (1878, 1885), Alexander Pushkin (1880, 1882, 1905, plus two "Yevgeny Onegin" editions, 1874, 1882), Alexander Polezhayev (1889).  He is credited with having discovered, published and written analytical essays on numerous hitherto unknown autographs by classics like Pushkin, Ryleyev, Lermontov, Radishchev, Fonvizin, Zhukovsky.

Alexander Radvilovich: Alexander Yuryevich Radvilovich (Russian: Александр Юрьевич Радвилович ; born 1955) is a Russian composer, pianist and teacher from Leningrad (now Saint Petersburg) from which Conservatory he also graduated at which he was under guidance from Sergei Slonimsky.  In 1992 and 1994 respectively he was the first ever composer of Russian origin to get education at the International New Music in Darmstadt.  He is known for his symphonies of two of his own poems called "Legend About Violinist" and "Pushkin".  At one time, after reading Fyodor Dostoyevsky he composed a string quartet called "The Boy at Christ’s New Year Celebration" and also designed a mini opera called "Let’s Write Fairy-tale".  He also composed an opera called "Hindrance" which was based on Danii Kharms' poem "Ruin of the Gods".  Currently he is a member of both Russian Composer’s and Saint Petersburg Composer's Unions and works as music pedagogue at the Humanitarian University of the Petersburg Conservatory.  On occasion, he tours the world as composer, pianist and leader of the Sound Ways which he also founded back in 1989.  His music is published by various labels in countries such as Russia, the Netherlands and the United States.

Sergey Lazarevich Lashkarev: Sergey Lazarevich Lashkarev (23 February 1739 — 6 October 1814) (Russian: Сергей Лазаревич Лашкарёв , derived from Georgian: ლაშკარაშვილი ბიბილური, Lashkarashvili-Bibiluri ), was a Russian Imperial Major-General of Georgian origin.  A cunning diplomat and polyglot, he was described by his contemporaries as one of the "remarkable phenomena of Catherine the Great's century".  Lashkarev was reportedly fluent in ten languages.  Besides Russian and Georgian, he spoke French, Italian, Turkish, Persian, Greek, Armenian, Arabic, and Latin.  In 1800, Lashkarev was actively involved in diplomatic exchanges with the Ottoman Empire in connection with the impending Russian annexation of various Georgian kingdoms and principalities, and remained in charge of Georgian affairs at the Imperial court under Alexander I of Russia.

Pyotr Ilyich Tchaikovsky and The Five: In mid- to late-19th-century Russia, Pyotr Ilyich Tchaikovsky and a group of composers known as The Five had differing opinions as to whether should be composed following Western or native practices.  Tchaikovsky wanted to write professional compositions of such quality that they would stand up to Western scrutiny and thus transcend national barriers, yet remain distinctively Russian in melody, rhythm and other compositional characteristics.  The Five, made up of composers Mily Balakirev, Alexander Borodin, César Cui, Modest Mussorgsky, and Nikolai Rimsky-Korsakov, sought to produce a specifically Russian kind of art music, rather than one that imitated older European music or relied on European-style conservatory training.  While Tchaikovsky himself used folk songs in some of his works, for the most part he tried to follow Western practices of composition, especially in terms of tonality and tonal progression.  Also, unlike Tchaikovsky, none of The Five were academically trained in composition; in fact, their leader, Balakirev, considered academicism a threat to musical imagination.  Along with critic Vladimir Stasov, who supported The Five, Balakirev attacked relentlessly both the Saint Petersburg Conservatory, from which Tchaikovsky had graduated, and its founder Anton Rubinstein, orally and in print.

Agrafena Saburova: Agrafena Timopheyevna Saburova (Russian: Аграфе′на Тимофе′евна Сабу′рова , née Okuneva, О′кунева; 1795, Saint Petersburg, Imperial Russia, — 2 February 1867, Saint Petersburg, Imperial Russia) was a prominent Russian stage actress.  Originally an opera singer (who lost her singing voice in 1831), she excelled in plays by Alexander Griboyedov, Nikolay Polevoy and Alexander Ostrovsky, first in Moscow's Maly Theatre, then during her short stint at the Saint Petersburg's Alexandrinsky Theatre which she retired from in 1861.  Actor Alexander Saburov (1800-1831) was her husband, actress and opera singer Ekaterina Saburova (1829-1905) their daughter.

Vasily Berkov: Vasily Ivanovich Berkov (Russian: Василий Иванович Берков) (Dutch: Wicher Berkhoff) (21 August 1794 in Vriezenveen, Netherlands – 5 April 1870 in Saint Petersburg, Russia) was a Russian shipbuilder and from 1829-1870 Director of the Admiralty Shipyard of Saint Petersburg, possibly in the rank of Counter-Admiral.  Berkov deserves special credit for his translations of West-European literature on shipbuilding, into the Russian language.  He was one of the so-called Rusluie, a Dutch community in 18th and 19th century Saint Petersburg, most of whose members originated from (Berkov's native town) Vriezenveen.

Alexander Borodin: Alexander Porfiryevich Borodin (Russian: Алекса́ндр Порфи́рьевич Бороди́н ; ] , 12 November 183327 February 1887) was a Russian Romantic composer of Georgian origin, as well as a doctor and chemist.  He was one of the prominent 19th century composers known as The Mighty Handful, a group dedicated to producing a uniquely Russian kind of classical music, rather than imitating earlier Western European models.

The Mighty Handful: The Mighty Handful (Russian: Могучая кучка ), also known as The Five and The New Russian School, were five prominent 19th-century Russian composers who worked together to create a distinctly Russian classical music.  Mily Balakirev (the leader), César Cui, Modest Mussorgsky, Nikolai Rimsky-Korsakov and Alexander Borodin all lived in Saint Petersburg, and collaborated from 1856 to 1870.

Supporting paragraphs: Alexander Dianin Alexander Borodin
Answer: The Mighty Handful