Adolf von Baeyer
In 1870 he and Adolph Emmerling, a student of Adolf von Baeyer, published a work in which the two first reported the formation of traces of indigo in a material not derived from indigo. Therefore, they have not found indigo “synthesis”, as often reported. Adolf von Baeyer succeeded in this in 1878, who also described in 1883 the correct structural formula.