Bongkrek acid
（重定向自Bongkrekic acid）
Bongkrek acid is a respiratory toxin more deadly than other mitochondrial poisons cyanide or 2,4-dinitrophenol. There was some dispute regarding the actual structure of bongkrek acid (also known as bongkrekic acid) but this was resolved in 1973, which explains different structures appearing in the literature prior to this date.