George Rosenkranz
George Rosenkranz ( born György Rosenkranz; 20 August 1916 – 23 June 2019 ) was a pioneering Mexican scientist in the field of steroid chemistry , who used native Mexican plant sources as raw materials . 
<triplet> George Rosenkranz <subj> 20 August 1916 <obj> date of birth <subj> 23 June 2019 <obj> date of death <subj> Mexican <obj> country of citizenship