Vladimir Prelog (23 July, 1906 – 7 January, 1998) was a Croatian-Swiss organic chemist, winner of the 1975 Nobel Prize for chemistry. Prelog lived and worked in Prague, Zagreb and Zürich during his lifetime. With the help of collaborators and students, and financially sponsored by the pharmaceutical factory “Kaštel” (currently Pliva), he started researching quinine and its compounds. Final works with the industry yielded a financially successful production of Streptazol, one of the first commercial sulfonamides. The results of Prelog’s work have been published in the top European chemical literature and journals, while the organic chemistry developed in Zagreb at that time was well known and identifiable around the world. He’s a honorary doctor of many universities and honorary member of the Croatian Academy of Sciences and Arts since 1986.