The chemical structure of penicillin was first proposed by Edward Abraham in 1942 .
The chemical structure of penicillin was first was later confirmed in 1945 using X-ray crystallography by Dorothy Crowfoot Hodgkin , who was also working at Oxford .
The chemical structure of penicillin was first proposed by Edward Abraham in 1942 and was later confirmed in 1945 using X-ray crystallography by Dorothy Crowfoot Hodgkin , who was also working at Oxford .