Complex sentence: John James Rickard Macleod FRS (6 September 1876--16 March 1935) was a Scottish biochemist and physiologist who devoted his career to diverse topics in physiology and biochemistry, but was chiefly interested in carbohydrate metabolism.
Split into simpler sentences: John James Rickard Macleod FRS (6 September 1876--16 March 1935) was a Scottish biochemist and physiologist. He devoted his career to diverse topics in physiology and biochemistry, but was chiefly interested in carbohydrate metabolism.