Russell Marker- Pioneer of the Steroid Hormone Industry Pyr/HCI diosgenin 1)KOH 2)Cr0 progesterone Marker Degradation' "Father of the Mexican steroid industry" Russell Earl Marker 1902-1995
Dr.Percy Julian A scientist makes inroads in chemistry and civil rights 豆固醇(Stigmasterol) 孕酮(Progesterone) African American research chemist and a pioneer in the chemical synthesis of medicinal drugs from plants
Stigmasterol to Progesterone Synthesis Percy Lavon Julian A Soybean Chemist Ernst Spath (1886-1946
Synthesis of Physostigmine In 1934 at DePauw University Percy Julian synthesized physostigmine from the amino acid, tryptophan. H Sir Robert Christison (1797-1882) Isolated in 1846 毒扁豆碱(Physostigmine) Robert Robinson (1886-1975)
The killer bean of Calabar “审判豆” John Hutton Balfour Robert Christison Thomas Richard Fraser (1808-1884) (1797-1882) Physostigma (1841-1920) Scottish botanist J.H.Balfour's Student venenosum R.Christison's Student Identified Plant i 1861 Isolated Eserine in 1863 Calabar bean Antagonism between physostigmine and atropine Antagonism Between Curare and Physostigmine 'Physostigmine,an Antidote to Curare