<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: I-Passage: I-furfural yahlukaniswa okokuqala ngo-1821 eyanyatheliswa ngo-1832 ngukhemikhali waseJalimane uJohann Wolfgang Döbereiner, owakhiqiza isampula elincane njengomkhiqizo ovela ku-formic acid synthesis. Umbuzo: Yiliphi i-asidi elalikhiqizwa uDöbereiner?  <response>: umnyovu 