Baeyer, Johann Friedrich Wilhelm Adolph von (1835–1917)
Johann Baeyer was a German organic chemist who was awarded the 1905 Nobel Prize
in Chemistry for his synthesis of indigo.
He also investigated uric acid derivatives,
discovered the phthalein dyes, and devised a "strain" theory to account
for the stability and conformation of carbon compounds with five-membered and six-membered rings.