Thottunkal di alufaa ni Ojo kokanla Osu kefa Odun 1986.. 
Bí ọ̀nà sí indigo, ìlànà yìí yọ ọ̀nà yìuí kúrò ní aniline.ètò ní Litireso Gẹ̀ẹ́sì wọ́n maa ń pe ìdàpọ̀ ṣiṣẹ́ yìí ní  ìdàpọ̀ ṣiṣẹ́ Baeyer–Drewson , bí ó tilẹ̀jẹ́pé ẹni tí ó kọ ìwé àkọ́kọ́ ní Drewsen.àwọn ìtọ́kasí àyọkà àgéyí àjọ̀è chemistry.. 