Salimuzzaman Siddiqui, Pakistani organic chemist (Subeha, Barabanki District 19 October 1897 – Karachi 14 April 1994)

Authored over 400 scientific papers

Isolated alkaloids as ajmaline, ajmalinine, ajmalicine, isoajmaline, neoajmaline, serpentine and serpentinine from Rauwolfia serpentina many of these used worldwide in the treatment of mental disorder and cardiovascular ailments 

Discovered and isolated a number of antibacterial compounds from various parts of the neem (Azadirachta indica) and other plants

Extracted nimbin, nimbinin and nimbidin from neem oil displaying medicinal properties (1942)

Isolated 6 new crystalline bases from Holarrhena anti-dysenterica  

Reported harmine, harmidine, harmol, harmidol, tetrahydroharmine and amino-tetrahydroharmin from Peganum harmala

Isolated the catechol derivative bhilawanol (1931) from bhilawan (Semecarpus anacardium)

Isolated and reported the structure of triterpenoids nimolicine, nimoline and 17-hydroxyazadiradione (1972)

Isolated chaksine and isochaksine from Cassia absus L., the first alkaloids carrying a monoterpenic nucleus

Held 50 patents (chemical compounds)

HONORS 

Doctor Honoris Causa, Frankfurt University (1958)