. "Aspergillic acid" . . . "aspergillic acid" . . . . "6-Butan-2-yl-1-hydroxy-3-(2-methylpropyl)pyrazin-2-one" . "Aspergillic acid" . . . . . . . . . . . . . "1-Hydroxy-6-(2-butanyl)-3-isobutyl-2(1H)-pyrazinone" . . .