Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Furfural bu ụzọ kewapụ na 1821 (nke e bipụtara na 1832) site n'aka German chemist Johann Wolfgang Döbereiner, onye mepụtara obere ihe nlele dị ka ihe na-emepụta site na njikọ nke formic acid.  Ajụjụ: Olee acid Döbereiner mepụtara?
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